Now the focus changed when we learned that the hatching eggs had to be kept warm (within certain limits) until hatched.
(the focus; changed; T:when we learned that the hatching eggs had to be kept warm; T:Now) (the hatching eggs; to be kept; ) (we; learned; that the hatching eggs had to be kept warm)
the focus the hatching eggs we
changed to be kept learned
T:when we learned that the hatching eggs had to be kept warm T:Now
that the hatching eggs had to be kept warm