Mouth Open<br>At night time, my mouth was falling open frequently. I purchased a mouth guard in the hopes it would help. In the middle of the night, I awoke with pain in my jaw. I tried changing position several times, to no avail. I finally removed the guard and gave up.
The person's mouth was falling open during lunch time.
( z1 open :ARG1 ( z2 mouth :part-of ( z3 person ) ) :time ( z4 lunch ) )