YOU SAID:
There's a horse, loose in the hospital!
INTO JAPANESE
病院には馬があります。
BACK INTO ENGLISH
There are horses in the hospital.
INTO JAPANESE
病院には馬がいます。
BACK INTO ENGLISH
There is a horse in the hospital.
INTO JAPANESE
病院には馬があります。
BACK INTO ENGLISH
There are horses in the hospital.
INTO JAPANESE
病院には馬がいます。
BACK INTO ENGLISH
There is a horse in the hospital.
it is unlikely that this phrase will ever reach equilibrium