Q:- years active is 1991 -- present    - landscape is yes    - caption is machine head performing in zurich in 2007 .    - origin is oakland , california , u.s.    - label is roadrunner , nuclear blast    - genre is groove nu metal -lrb- 1999 -- 2001 -rrb- metal , thrash metal , heavy metal ,        - image size is 250    - background is group_or_band    - image is machine_head_live_zurich . jpg    - current members is robb flynn dave mcclain phil demmel jared maceachern    - associated acts is sylosis ill nino , hatriot , sanctity , medication , forbidden , vio-lence , sacred reich ,    Given the details above, guess who could this information be about.
A:
machine head -lrb- band -rrb-