Their coat changes color twice a year to help them blend into the white winter or brown summer landscape.
(Their coat changes; color; T:twice a year; to help them blend into the white winter or brown summer landscape) (Their coat changes; to help; them blend into the white winter or brown summer landscape) Context(Their coat changes to help,List([0, 45))):(them; blend; into the white winter or brown summer landscape)
Their coat changes to help,List([0, 45))
Their coat changes Their coat changes them
color to help blend
T:twice a year to help them blend into the white winter or brown summer landscape
them blend into the white winter or brown summer landscape
into the white winter or brown summer landscape