instruction:
In this task, you're given an input that contains two words, and your task is to predict the correct preposition that connects these two words. Predict the preposition that explicitly conveys both words' meaning, e.g., Word1: king 
 Word2: fort: "king of fort". Possible prepositions are: "of", "on", "in", "for", "from", "about", and "with".
question:
Word1: cells 
 Word2: cancer
answer:
with


question:
Word1: demand 
 Word2: security
answer:
for


question:
Word1: problem 
 Word2: union
answer:

of