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".

Example Input: Word1: rate 
 Word2: vehicle
Example Output: of

Example Input: Word1: demand 
 Word2: security
Example Output: for

Example Input: Word1: collection 
 Word2: debt
Example Output:
of