Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Together, the muscular and skeletal organs are known as the musculoskeletal system.

Answer: Together, the muscular and skeletal organs are known as what?


Question: On a global scale, plants and other photosynthetic organisms have generated all of the oxygen in the air.

Answer: On a global scale, plants and other photosynthetic organisms have generated all of what element in the air?


Question: Standard measurements in science are very important so that we can compare experimental data from one lab to another and make sure we all are talking about the same thing.

Answer:
What in science are very important so that we can compare experimental data from one lab to another and make sure we all are talking about the same thing?