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".

[Q]: Word1: price 
 Word2: selling
[A]: for


[Q]: Word1: system 
 Word2: ventilation
[A]: of


[Q]: Word1: festival 
 Word2: Passover
[A]:
for