YOU SAID:
A car was riding a human
INTO JAPANESE
車が人間に乗っていた
BACK INTO ENGLISH
the car was ridden by a human
INTO JAPANESE
その車は人間が乗っていた
BACK INTO ENGLISH
The car was manned
INTO JAPANESE
車は有人だった
BACK INTO ENGLISH
the car was manned
INTO JAPANESE
車は有人だった
BACK INTO ENGLISH
the car was manned
Come on, you can do better than that.