instruction: Is the next sentence syntactically and semantically acceptable?

The baby dressed.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The dog fears thunder.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Sandy must, too.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

We have someone in the living room.

response:
acceptable