Scientists have known for years now that the blue mussel can raise or lower its ability to hold onto the slippery rocks.
(the blue mussel; lower; its ability to hold onto the slippery rocks) (Scientists; have known; T:for years; T:now; that the blue mussel can raise or lower its ability) Context(Scientists have known,List([0, 21))):(the blue mussel; can raise; )
Scientists have known,List([0, 21))
the blue mussel Scientists the blue mussel
lower have known can raise
its ability to hold onto the slippery rocks
T:for years T:now that the blue mussel can raise or lower its ability