Would a linguist find the following sentence to be a valid English sentence grammatically?

It was several young students that the policeman met in the park last night.
OPTIONS:
- unacceptable
- acceptable
acceptable
Skulle en lingvist finna följande mening vara en giltig engelsk mening grammatiskt? Det var flera unga studenter som polismannen träffade i parken igår kväll. ALTERNATIV: - oacceptabelt - godtagbart
Would a linguist find the following sentence to be a valid English sentence grammatical? There were several young students that the policeman met in the park last night. ALTERNATIVES: - unacceptable - acceptable
kan godtas
Acceptable