instruction: Is the next sentence syntactically and semantically acceptable?

Wanda taught the students.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I know a man who John is taller than is.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It was roses that the gardener planted in the garden.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The effectiveness of teaching and learning depends on several factors.

response:
acceptable