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".
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Question: Word1: firm 
 Word2: software

Answer: for


Question: Word1: engine 
 Word2: titanium

Answer: of


Question: Word1: industry 
 Word2: metallurgy

Answer:
for