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: Explain to me what the main subject of this article is:

"California officials are investigating the disappearance of 30 tons (61,000 pounds) of ammonium nitrate from a railcar crossing the Midwest. Ammonium nitrate, which is used as fertilizer, can also be used to create explosives and was a key component in the homemade bomb used in the 1995 attack on the Murrah Federal Building in Oklahoma City. The chemical was shipped by train from Cheyenne, Wyoming last month but when it arrived in the Mojave Desert two weeks later, its holding car was empty and the nitrate was gone. Dyno Nobel, the company responsible for shipping the ammonium nitrate is a leader in commercial explosives and filed a report with the federal National Response Center (NRC) on May 10 and an investigation is currently underway.

The Federal Railroad Administration, the California Public Utilities Commission, Union Pacific, and Dyno Nobel are looking into the disappearance, and the railcar is being transported back to Wyoming to undergo a thorough inspection. It is unclear how or when the chemical disappeared during transit, but Dyno Nobel told KQED News, “The railcar was sealed when it left the Cheyenne facility, and the seals were still intact when it arrived in Saltdale. The initial assessment is that a leak through the bottom gate on the railcar may have developed in transit.”
Response: This article covers an ongoing investigation into the disappearance of 30 tons of ammonium nitrate that was being transported from Wyoming to the Mojave Desert by railcar. While mainly used as a fertilizer this substance can also be used as an explosive which raises security concerns.  Several agencies, including the California Public Utilities Commission, are investigating.

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.

Provide a summarized overview of the key principles and steps involved in creating an informative summary of a lengthy informational text, article, or research report:

Effectively summarizing comprehensive informational materials requires adhering to specific principles and following a methodical process. Key principles include identifying and capturing only the text's core concepts, ideas, and essential information while omitting superfluous details. Rephrase using concise, clear language rather than copying verbatim. Maintain an impartial tone that accurately represents the author's perspective and avoids personal interpretation or judgment. Organize logically and include relevant supporting evidence. Credit the source appropriately.  
  
The summarization process itself typically involves these steps: First, gain a general understanding by skimming the full text. Next, locate and note the stated main idea, central claims, or primary objectives. Then identify all topic sentences, key definitions, supporting facts and examples substantiating the main points. Thoroughly analyze to determine what is crucial versus extraneous. Synthesize the essential components into concise paragraphs capturing the text's substance. Finally, compare against the original for accuracy and make any needed revisions before finalizing the summary.

Adherence to these principles and methodology enables creating summaries that clearly and faithfully condense the crux of complex informational materials while meeting necessary length constraints.
user
The key principles of informative text summarization are: capturing only core concepts and essential information; rephrasing concisely; maintaining impartial tone/author perspective; including relevant evidence; proper source attribution. The process involves: skimming full text; locating main idea/claims; identifying topic sentences and supporting details; determining importance of content; synthesizing essentials into concise paragraphs; verifying accuracy against original. Following these principles and methodology enables condensing complex materials into clear, faithful summaries meeting length requirements.
assistant