Three times (every 1200 years), the gods were distressed by the <e1>disturbance</e1> from human <e2>overpopulation</e2>.
Three times (every 1200
Three times (every 1200 years), the gods were distressed by the disturbance from human overpopulation.
<triplet> disturbance <subject> overpopulation <object> Cause-Effect(e2,e1)