YOU SAID:
I ate a chicken sandwich yesterday isn't that fascinating
INTO JAPANESE
昨日チキンサンドイッチを食べたのはそんなに面白くない
BACK INTO ENGLISH
Eating a chicken sandwich yesterday is not so interesting
INTO JAPANESE
昨日チキンサンドイッチを食べるのはそれほど面白くない
BACK INTO ENGLISH
Eating a chicken sandwich yesterday is not so interesting
That didn't even make that much sense in English.