Perhaps you have had the experience of sitting outside on a warm summer day listening to crickets chirping haphazardly for a period of time, then almost at once their chirps coincide and they begin to chirp in unison--the crickets' chirping became entrained.
(they; begin; to chirp in unison) Context(they begin,List([187, 197))):(they; begin to chirp; L:in unison) (the crickets' chirping; became; entrained) (crickets; chirping haphazardly; T:for a period of time) (the crickets' chirping; entrained; )
they begin,List([187, 197))
they they the crickets' chirping crickets the crickets' chirping
begin begin to chirp became chirping haphazardly entrained
to chirp in unison
L:in unison
entrained
T:for a period of time