<Ul> <Li> Alternative hip hop </Li> <Li> electropop </Li> <Li> indie pop </Li> <Li> pop rock </Li> <Li> rap rock </Li> </Ul> <Li> Alternative hip hop </Li> <Tr> <Th> Years active </Th> <Td> 2009--present </Td> </Tr> <Tr> <Th> Labels </Th> <Td> <Ul> <Li> Fueled by Ramen </Li> <Li> DCD2 </Li> <Li> WEA International </Li> <Li> Atlantic </Li> </Ul> </Td> </Tr>

How many albums does twenty one pilots have