YOU SAID:
Pillows are not very soft when they're made of rocks.
INTO JAPANESE
枕は岩でできているとあまり柔らかくありません。
BACK INTO ENGLISH
Pillows are not very soft if they are made of rock.
INTO JAPANESE
鉛筆は黒鉛でできており、鉛は使用していません。
BACK INTO ENGLISH
They are made of graphite, not led
INTO JAPANESE
鉛筆は黒鉛でできており、鉛は使用していません。
BACK INTO ENGLISH
They are made of graphite, not led
That didn't even make that much sense in English.