YOU SAID:

A cat strolled across the park then a dog chased it

INTO JAPANESE

猫が公園を散歩した後、犬が公園を追いかけました

BACK INTO ENGLISH

The dog chased the park after the cat walked in the park

INTO JAPANESE

猫が公園を歩いた後、犬は公園を追いかけた

BACK INTO ENGLISH

The dog chased the park after the cat walked in the park