In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
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Question: Question: Which crust lies deep inside the ocean? Answer: oldest

Answer: Oldest crust lies deep inside the ocean.

Question: Question: When different types of tissues work together to perform a unique function, what do they form? Answer: organ

Answer: When different types of tissues work together to perform a unique function, they form organ.

Question: Question: What type of radio waves exist in the 540 to 1600 khz frequency range? Answer: am radio waves

Answer:
Am radio waves exist in the 540 to 1600 khz frequency range.