YOU SAID:
horse riding off into the sunset
INTO JAPANESE
夕日に馬に乗って
BACK INTO ENGLISH
Riding a horse in the sunset
INTO JAPANESE
日没で馬に乗る
BACK INTO ENGLISH
Horse ride at sunset
INTO JAPANESE
日没時の乗馬
BACK INTO ENGLISH
Horseback riding at sunset
INTO JAPANESE
日没時の乗馬
BACK INTO ENGLISH
Horseback riding at sunset
That didn't even make that much sense in English.