Bismuth sulfide , -LRB- -LRB- Bismuth -LRB- III -RRB- sulfide -RRB- -RRB- , occurs naturally in bismuth ores .
Bismuth sulfide is a common ore of bismuth .
Bismuth sulfide is a common ore of bismuth .
Write a simpler version for the sentence: Bismuth sulfide , -LRB- -LRB- Bismuth -LRB- III -RRB- sulfide -RRB- -RRB- , occurs naturally in bismuth ores . Output: