Task: Paraphrasing
Input (English): Question: On a global scale, plants and other photosynthetic organisms have generated all of what element in the air? 
Answer: oxygen. 
Sentence: On a global scale, plants and other photosynthetic organisms have generated all of the oxygen in the air.
Output (English): On a global scale, all of the oxygen is the one element that is generated by plants and other photosynthetic organisms in the air.