Assertion: snorkel's tube | /r/CapableOf | project around the user's head
Facets:
value: alternatively
type: MANNER
Source sentences:
text: The two tubes may either project separately upward and open into the atmosphere on either side of the head, or alternatively, may project around the user's head and come together in a mating channel which then protrudes from a single tube at the top of the user's head.