You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: story 
 Word2: pearl
Solution: of
Why? The preposition correctly connects two words turning it into the sentence 'story of pearl'.

New input: Word1: concerto 
 Word2: violin
Solution:
for