<Table> <Tr> <Th_colspan="2"> Alabama Crimson Tide football </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> 2018 Alabama Crimson Tide football team </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> First season </Th> <Td> 1892 </Td> </Tr> <Tr> <Th> Athletic director </Th> <Td> Greg Byrne </Td> </Tr> <Tr> <Th> Head coach </Th> <Td> Nick Saban 11th season, 127--20 (. 864) </Td> </Tr> <Tr> <Th> Other staff </Th> <Td> See Coaching staff section </Td> </Tr> <Tr> <Th> Stadium </Th> <Td> Bryant--Denny Stadium (Capacity: 101,821) </Td> </Tr> <Tr> <Th> Field surface </Th> <Td> Natural grass </Td> </Tr> <Tr> <Th> Location </Th> <Td> Tuscaloosa, Alabama </Td> </Tr> <Tr> <Th> Conference </Th> <Td> Southeastern Conference </Td> </Tr> <Tr> <Th> Division </Th> <Td> Western </Td> </Tr> <Tr> <Th> Past conferences </Th> <Td> Southern Conference (1921--1932) </Td> </Tr> <Tr> <Th> All - time record </Th> <Td> 891--327--43 (. 724) </Td> </Tr> <Tr> <Th> Bowl record </Th> <Td> 40--25--3 (. 610) </Td> </Tr> <Tr> <Th> Playoff appearances </Th> <Td> 4 (2014, 2015, 2016, 2017) </Td> </Tr> <Tr> <Th> Playoff record </Th> <Td> 5--2 (. 714) </Td> </Tr> <Tr> <Th> Claimed nat'l titles </Th> <Td> 17 (1925, 1926, 1930, 1934, 1941, 1961, 1964, 1965, 1973, 1978, 1979, 1992, 2009, 2011, 2012, 2015, 2017) </Td> </Tr> <Tr> <Th> Unclaimed nat'l titles </Th> <Td> 4 (1945, 1966, 1975, 1977) </Td> </Tr> <Tr> <Th> National finalist </Th> <Td> 3 (2015, 2016, 2017) </Td> </Tr> <Tr> <Th> Conference titles </Th> <Td> 30 (Southern Conference: 4; SEC: 26) </Td> </Tr> <Tr> <Th> Division titles </Th> <Td> 13 </Td> </Tr> <Tr> <Th> Rivalries </Th> <Td> Auburn Tigers (rivalry) LSU Tigers (rivalry) Tennessee Volunteers (rivalry) See Rivalries below for others </Td> </Tr> <Tr> <Th> Heisman winners </Th> <Td> 2 (Mark Ingram 2009 and Derrick Henry 2015) </Td> </Tr> <Tr> <Th> Consensus All - Americans </Th> <Td> 69 </Td> </Tr> <Tr> <Th> Colors </Th> <Td> Crimson and White </Td> </Tr> <Tr> <Th> Fight song </Th> <Td> Yea Alabama </Td> </Tr> <Tr> <Th> Mascot </Th> <Td> Elephant (Big Al) </Td> </Tr> <Tr> <Th> Marching band </Th> <Td> Million Dollar Band </Td> </Tr> <Tr> <Th> Website </Th> <Td> RollTide.com </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Alabama Crimson Tide football </Th> </Tr>

How many times has alabama won the national championship in college football
find me the text answering this question