# data[].attributes.body
I also struggle with prepositions at moments, I would suggest taking the time to translate the sentence to english in your head before deciding which preposition. 

# data[].attributes.body
https://docs.google.com/document/d/1Ic_iKQHxBhuwTcm7FpWvjc85DEaFyYKyMWf9P5rIDFE/edit?usp=sharing