Question: What genre of music links the bands Catherine and X? 
Related documents: [0]  [DOC] Catherine was an alternative rock band from Chicago, Illinois that was active from 1985 to 1998. They were signed to TVT Records. [END] 
[1]  [DOC] X is an American punk rock band, formed in Los Angeles in 1977, among the first wave of American punk. The original members are vocalist Exene Cervenka, vocalist/bassist John Doe, guitarist Billy Zoom and drummer D.J. Bonebrake. The band released seven studio albums from 1980 to 1993. After a period of inactivity during the mid to late 1990s, X reunited in the early 2000s, and currently tours. [END] 
Answer: 
rock
rock