With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Grunge became successful commercially due partially to Nirvana 's Nevermind .
text_B: Grunge started to become a commercial success in the 1970s due to bands like The Rolling Stones , Nirvana appeared when grunge was old fashioned .
REFUTES.