question: What is the purpose of charms ?
answer: provides access to system and app-related functions , such as search , sharing , device management , settings , and a Start button
turker_answer: The purpose of charms are to provide access to system and app-related functions , such as search , sharing , device management , settings , and a Start button .
rule-based: The purpose of charms is provides access to system and app-related functions , such as search , sharing , device management , settings , and a Start button .