Question: Which singer was the leader of an alternative rock band,  Bob Mould or Hayley Williams?

Related documents: [0]  [DOC] Hayley Nichole Williams (born December 27, 1988) is an American singer, songwriter and musician. She serves as the lead vocalist, primary songwriter and occasional keyboardist of the rock band Paramore. The band was formed in 2004 by Josh Farro, Zac Farro, Jeremy Davis and Williams. The band consists of Hayley Williams, Zac Farro and Taylor York. The band has five studio albums: "All We Know Is Falling" (2005), "Riot!" (2007), "Brand New Eyes" (2009), "Paramore" (2013) and "After Laughter" (2017). [END] 
[1]  [DOC] Robert Arthur Mould (born October 16, 1960) is an American musician, principally known for his work as guitarist, vocalist and songwriter for alternative rock bands Hüsker Dü in the 1980s and Sugar in the 1990s. [END]  
Answer: Robert Arthur Mould
Robert Arthur Mould