Part 1. Definition
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".
Part 2. Example
Word1: story 
 Word2: pearl
Answer: of
Explanation: The preposition correctly connects two words turning it into the sentence 'story of pearl'.
Part 3. Exercise
Word1: fluctuation 
 Word2: stock
Answer:
in