instruction: Is the next sentence syntactically and semantically acceptable?

The dragons had all eaten the pigs.

response: acceptable


instruction: Is the next sentence syntactically and semantically acceptable?

the day when I met her was sunny.

response: acceptable


instruction: Is the next sentence syntactically and semantically acceptable?

Is likely to Jean dance.

response: unacceptable


instruction: Is the next sentence syntactically and semantically acceptable?

Calvin will fire someone today, but I don't know who.

response:
acceptable