instruction: Is the next sentence syntactically and semantically acceptable?

Students objected to the teacher.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The teacher who the reporters expected that the principal would fire is a crusty old jerk.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Ellen told Helen a story.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The travelers have returned from their vacation.

response:
acceptable