Assertion: folk singer's song | /r/HasProperty | useful
Facets:
value: for different tasks
type: PURPOSE
Source sentences:
text: Since different songs were useful for different tasks they are traditionally divided into three main categories, short haul shanties, for tasks requiring quick pulls over a relatively short time; halyard shanties, for heavier work requiring more set-up time between pulls; and Capstan shanties, for long, repetitive tasks requiring a sustained rhythm, but not involving working the lines.