YOU SAID:

once there was a dog and a cat who lived on a spaceship with aliens and giant frogs

INTO JAPANESE

かつて、エイリアンと巨大なカエルと宇宙船に住んでいた犬と猫がいました

BACK INTO ENGLISH

Once there were aliens and giant frogs and dogs and cats that lived in spaceships

INTO JAPANESE

宇宙船に住んでいたエイリアンと巨大なカエルと犬と猫がいました

BACK INTO ENGLISH

There were aliens and giant frogs and dogs and cats who lived on the spaceship

INTO JAPANESE

宇宙船に住んでいたエイリアンと巨大なカエルと犬と猫がいました

BACK INTO ENGLISH

There were aliens and giant frogs and dogs and cats who lived on the spaceship