instruction: Is the next sentence syntactically and semantically acceptable?

Roses flowered in the garden.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

There tried to be intelligent.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John seems to rain.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It tends to be warm in September.

response:
acceptable