Assertion: spasm's cause | /r/HasProperty | sudden movement
Facets:
Source sentences:
text: What causes trouble may be a sudden movement in the heat of a tennis match or a game of touch football, or a fall, twist, or sudden muscle contraction to avoid a fall.
text: What causes trouble may be a sudden movement in the heat of a tennis match or a game of touch football, or a fall, twist, or sudden muscle contraction to avoid a fall.