instruction: Is the next sentence syntactically and semantically acceptable?

There is believed to be a sheep in the park.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

In the hallway ticked a grandfather clock.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

You kicked you

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

This book is easy to read.

response:
acceptable