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".

Word1: index 
 Word2: price
of

Word1: volume 
 Word2: gas
of

Word1: rendering 
 Word2: thunderclap

of