YOU SAID:

There is a challenging horse in the neighborhood pool

INTO JAPANESE

近所のプールに挑戦的な馬がいます

BACK INTO ENGLISH

There are challenging horses in the neighborhood pool

INTO JAPANESE

近所のプールには挑戦的な馬がいます

BACK INTO ENGLISH

Neighborhood pools have challenging horses

INTO JAPANESE

近所のプールには挑戦的な馬がいます