YOU SAID:
I am so sad that my rabbit died from cancer
INTO JAPANESE
うちのうさぎがガンで亡くなってとても悲しいです
BACK INTO ENGLISH
I am very sad that my rabbit died of cancer.
INTO JAPANESE
うちのウサギが癌で亡くなってとても悲しいです。
BACK INTO ENGLISH
I am very sad that my rabbit died of cancer.
That didn't even make that much sense in English.