instruction:
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".
question:
Word1: commission 
 Word2: exchange
answer:
on


question:
Word1: gap 
 Word2: trade
answer:
in


question:
Word1: premium 
 Word2: conversion
answer:

on