What are the keywords in the following sentence? meeting their baby brother for the first time .
brother, meet, time

What are the keywords in the following sentence? crossing a bridge over one of the trails en route .
bridge, cross, trail

What are the keywords in the following sentence? There is a train moving through a track yard
move, train, yard

What are the keywords in the following sentence? pink tree under a heart shaped cloud
cloud, heart, shape