YOU SAID:

run away were the long lost children

INTO JAPANESE

長い間行方不明になった子供たちが逃げ出した

BACK INTO ENGLISH

Children who have been missing for a long time have escaped

INTO JAPANESE

長い間行方不明になっていた子供たちが逃げ出した

BACK INTO ENGLISH

Children who have been missing for a long time have escaped