Assertion: double helix | /r/HasProperty | introduced as ninth obstacle
Facets:
value: firstly
type: MANNER
Source sentences:
text: The Double Helix is an obstacle, firstly introduced as the ninth obstacle during Orlando finals on American Ninja Warrior 7, It consists of two center axes, one after the other, each with 8 rods per axis (with a total of 16 rods) sticking out of them forming two helices.