YOU SAID:
a dog ran away and attacked a alien
INTO JAPANESE
犬が逃げ出し、エイリアンを襲った
BACK INTO ENGLISH
A dog ran away and attacked an alien
INTO JAPANESE
犬が逃げて宇宙人を襲った
BACK INTO ENGLISH
A dog escaped and attacked an alien
INTO JAPANESE
犬が脱走して宇宙人を襲った
BACK INTO ENGLISH
A dog escaped and attacked an alien
That didn't even make that much sense in English.