YOU SAID:

my kitten is the one who stole the diamond from the market place on the 5th of march 1927

INTO JAPANESE

私の子猫は1927年3月5日に市場でダイヤモンドを盗んだ人

BACK INTO ENGLISH

My kittens were those who stole diamonds on the market on March 5, 1927

INTO JAPANESE

私の子猫は1927年3月5日に市場でダイヤモンドを盗んだ人たちでした

BACK INTO ENGLISH

My kittens were those who stole diamonds on the market on March 5, 1927