poč́a•š-petə̑rkala•š (-am)-(-em)
{verb I – verb II} 1. to open and close
♦ kla•ssə̑m poč́a•š-petə̑rkala•š (-am)-(-em) {verb I – verb II} to open and close class rooms
--"PARENT"--> poč́a•m
--"PARENT"--> petə̑rkale•m