YOU SAID:

The detective guessed a martian had landed

INTO JAPANESE

探偵は、火星で上陸していた推測

BACK INTO ENGLISH

Detective's guesses had landed in the Mars

INTO JAPANESE

探偵の推測は火星で上陸していた

BACK INTO ENGLISH

The detective had landed on Mars

INTO JAPANESE

探偵は、火星に着陸しました。

BACK INTO ENGLISH

Detectives probe lands on Mars.

INTO JAPANESE

探偵は、火星の土地をプローブします。

BACK INTO ENGLISH

Detectives probe lands on Mars.