Assertion: skydiver's speed | /r/HasProperty | achieved by cut
Facets:
value: in various sections
type: LOCATION
value: across the back
type: OTHER
Source sentences:
text: Forward speed (5–13 km/h) and steering can be achieved by cuts in various sections (gores) across the back, or by cutting four lines in the back thereby modifying the canopy shape to allow air to escape from the back of the canopy, providing limited forward speed.