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: darkness 
 Word2: well

Answer: of


Question: Word1: slip 
 Word2: economy

Answer: in


Question: Word1: extinction 
 Word2: bacteria

Answer:
of