The water rushing off that safe platform started to wash the seal back into the sea, but then the <e1>humpback</e1> gave the seal a gentle nudge with its <e2>flipper</e2>.
The water rushing off
The water rushing off that safe platform started to wash the seal back into the sea, but then the humpback gave the seal a gentle nudge with its flipper.
<triplet> humpback <subject> flipper <object> Component-Whole(e2,e1)