YOU SAID:

but there could only be one.

INTO JAPANESE

しかし、そこだけあることができます.

BACK INTO ENGLISH

however, there can be.

INTO JAPANESE

ただし、存在することができます.

BACK INTO ENGLISH

you can, however, exist.

INTO JAPANESE

ことができます、しかし、存在.

BACK INTO ENGLISH

you can, however, exist.