question: What are used to navigate oceans?
choices.text: cnidarians lamphreys ocean temperatures magnets smoke signals spacecraft laptops calibrated
choices.label: A B C D E F G H
fact2: Magnets are used in compasses.
combinedfact: magnets are used to navigate oceans
formatted_question: What are used to navigate oceans? (A) cnidarians (B) lamphreys (C) ocean temperatures (D) magnets (E) smoke signals (F) spacecraft (G) laptops (H) calibrated