Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Shorten the following text to less than 50 words: 

Plant oils have been used medicinally for over 2,500 years. The first references to the use of plant oils can be traced to Chinese medicine, also known as Traditional Chinese Medicine.

Various parts of plants were consumed in either the raw state or dried, boiled, or steamed (to extract the oil). The end product was then consumed, inserted into any one of the natural openings of the body, massaged into the skin, or inhaled in vapor form.

During the Medieval period, a collection of medicinal treatments for a variety of ailments was published by Abu Ali al-Husain Ebn Abdullah Ebn Sina (980–1037 AD). He was known in the West as Avicenna, a Persian physician who was also known as one of the most influential medical writers in the medieval period.

Avicenna`s Canon of Medicine, arguably one of the most famous books in the history of medicine, presents a clear and organized summary of all of the medical knowledge of the time, including a long list of drugs. Interestingly, lily and spotted orchid oils are mentioned as remedies for tinnitus (Mahdizadeh et al, 2015).

Throughout the 18th and 19th centuries, advances in western medicine progressed. The American Medical Association was founded in 1847 and the American Pharmaceutical Association was founded in 1852. At the federal level, the Food, Drug, and Insecticide Administration (FDIA) was created 1927 and, three years later, changed its name to the Food and Drug Administration (FDA).
Response: Plant oils have been used for a long time. Plants in general have been used in many forms and in many ways, with publications about this ranging from Traditional Chinese Medicine to the Medieval period. Since then, Western medicine has progressed, with organizations like the FDA being founded. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Summarize the challenges and limitations of text summarization as described in the following text:

Despite the advances in text summarization techniques, several challenges and limitations remain. One key challenge is the inherent ambiguity and context-dependence of natural language. Accurately interpreting the nuances, implications, and underlying meaning of text can be difficult for automated systems, particularly in domains with specialized terminology or complex subject matter.

Another challenge is dealing with various text genres and styles, each with its own conventions and rhetorical structures. A summarization approach that works well for news articles may not be as effective for scientific papers, legal documents, or creative writing.

Additionally, summarization systems often struggle with coherence and fluency, as the process of condensing and rearranging content can disrupt the logical flow and readability of the text. Preserving referential integrity and maintaining a clear narrative structure is crucial for producing high-quality summaries.

Furthermore, many summarization techniques rely on extractive methods, which select and concatenate salient sentences from the original text. While effective for certain applications, extractive methods may fail to capture the essence of the text when paraphrasing or abstraction is required.

Finally, the evaluation of summarization quality remains a challenging task, as it often requires human judgment and can be subjective. Developing objective and reliable metrics for assessing the accuracy, relevance, and coherence of summaries is an ongoing area of research.
user
Text summarization faces several challenges and limitations: ambiguity and context-dependence of natural language, differences in text genres and styles, maintaining coherence and fluency in condensed text, limitations of extractive methods that concatenate sentences without abstraction, and the subjective nature of evaluating summary quality. Accurately interpreting meaning, dealing with specialized domains, preserving logical flow and readability, capturing the essence through abstraction, and developing reliable evaluation metrics remain ongoing challenges in this field.
assistant