YOU SAID:

We have reason to believe that that's where they could be planning to sell the sword.

INTO JAPANESE

それが彼らが剣を売ることを計画しているかもしれないところだと私達は信じる理由があります。

BACK INTO ENGLISH

We have reason to believe that is where they may be planning to sell their swords.

INTO JAPANESE

それが彼らが彼らの剣を売ることを計画しているかもしれないところであると私達は信じる理由があります。

BACK INTO ENGLISH

We have reason to believe that is where they may be planning to sell their swords.