<e1>Hiccups</e1> are caused by a <e2>spasm</e2> contracting the diaphragm, a muscle essential in human respiration.
Hiccups are caused by
Hiccups are caused by a spasm contracting the diaphragm, a muscle essential in human respiration.
<triplet> Hiccups <subject> spasm <object> Cause-Effect(e2,e1)