A <e1>mother</e1> was seen to have built a small <e2>raft</e2> out of birch bark for her and her children, but it promptly sank among the ice floes.
A mother was seen
A mother was seen to have built a small raft out of birch bark for her and her children, but it promptly sank among the ice floes.
<triplet> mother <subject> raft <object> Product-Producer(e2,e1)