Assertion: roller coaster's loop | /r/HasProperty | followed by half twist
Facets:
Source sentences:
text: In an Immelmann, riders enter a half-loop followed by a half twist, and then exit the element traveling in the opposite direction making a 180-degree turn.
text: The Immelmann loop is an element in which the train enters a half-loop followed by a half-twist and curve out in the direction opposite from which the train came.
text: In an Immelmann, riders enter a half-loop followed by a half twist, and then exit the element traveling in the opposite direction making a 180-degree turn.