Experts speculate that each day, at least one of these known species become extinct.
(Experts; speculate; that each day, at least one of these known species become extinct) Context(Experts speculate,List([0, 17))):(at least one of these known species; become; extinct; T:each day)
Experts speculate,List([0, 17))
Experts at least one of these known species
speculate become
that each day, at least one of these known species become extinct
extinct T:each day