However, the snowy owl is dependent upon lemmings for its steady diet when it is raising young on the arctic tundra in spring and summer.
(the snowy owl; is; dependent upon lemmings for its steady diet; T:when it is raising young on the arctic tundra in spring and summer) (it; is raising; young) (the snowy owl; is dependent upon; lemmings)
the snowy owl it the snowy owl
is is raising is dependent upon
dependent upon lemmings for its steady diet T:when it is raising young on the arctic tundra in spring and summer
young
lemmings