Read the following passage and answer if the question is true or false.
Passage: Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the gram-staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane.

Question: do gram negative bacteria have a cell wall?

Is the answer True or False? Respond with only "True" or "False" and no additional text.
True.