As Mr. Appenzeller retracted his hand in shock, a <e1>head</e1> popped out of the wet <e2>clothing</e2>, its eyes wide and frightened.
As Mr. Appenzeller retracted
As Mr. Appenzeller retracted his hand in shock, a head popped out of the wet clothing, its eyes wide and frightened.
<triplet> head <subject> clothing <object> Entity-Origin(e1,e2)