<P> The Election Act fixes the election to a three - month period, between March 1 and May 31 in the fourth calendar year after the preceding election day which in this case was May 5, 2015 . However, this does not affect the powers of the Lieutenant Governor to dissolve the Legislature before this period . </P> <P> This will be the first general election held after the Alberta New Democratic Party defeated the Progressive Conservative government in 2015 - an election which marked only the fourth change of government in the province's history . It will also be the first election contested by the United Conservative Party, formed in 2017 by a merger of the Progressive Conservatives and the Wildrose Party . </P> <Table> <Tr> <Th_colspan="2"> Party </Th> <Th> Party leader </Th> <Th_colspan="2"> Seats </Th> </Tr> <Tr> <Td> 2015 </Td> <Td> Current </Td> </Tr> <Tr> <Td> </Td> <Td> New Democratic </Td> <Td> Rachel Notley </Td> <Td> 54 </Td> <Td> 54 </Td> </Tr> <Tr> <Td> </Td> <Td> United Conservative </Td> <Td> Jason Kenney </Td> <Td> 30 </Td> <Td> 26 </Td> </Tr> <Tr> <Td> </Td> <Td> Alberta Party </Td> <Td> Stephen Mandel </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Progressive Conservative </Td> <Td> Jason Kenney </Td> <Td> 9 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Liberal </Td> <Td> David Khan </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Wildrose </Td> <Td> Jason Kenney </Td> <Td> 21 </Td> <Td> 0 </Td> </Tr> <Tr> <Td> </Td> <Td> Freedom Conservative </Td> <Td> Derek Fildebrandt </Td> <Td> 0 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="2"> Independent </Td> <Td> 0 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="2"> Vacant </Td> <Td> </Td> <Td> 0 </Td> </Tr> <Tr> <Td_colspan="3"> Total </Td> <Td> 87 </Td> <Td> 87 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Party </Th> <Th> Party leader </Th> <Th_colspan="2"> Seats </Th> </Tr>

Who is running in the alberta provincial election
find me the text answering this question