<Li> Chai Hansen as Jordan Kyle </Li> <Li> Tessa Mossey as Heidi McKenzie </Li> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 13 </Td> <Td_colspan="1"> January 12, 2016 (2016 - 01 - 12) </Td> <Td> April 5, 2016 (2016 - 04 - 05) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> 20 </Td> <Td> 10 </Td> <Td_colspan="1"> January 2, 2017 (2017 - 01 - 02) </Td> <Td> March 6, 2017 (2017 - 03 - 06) </Td> </Tr> <Tr> <Td> 10 </Td> <Td_colspan="1"> June 5, 2017 (2017 - 06 - 05) </Td> <Td> August 14, 2017 (2017 - 08 - 14) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> 22 </Td> <Td> 10 </Td> <Td_colspan="1"> March 20, 2018 (2018 - 03 - 20) </Td> <Td> May 15, 2018 (2018 - 05 - 15) </Td> </Tr> <Tr> <Td> 12 </Td> <Td_colspan="1"> 2019 (2019) </Td> <Td> 2019 (2019) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

How many seasons of the shadowhunters are there
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