<Table> <Tr> <Th_colspan="2"> The Crimson Field </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Genre </Th> <Td> Drama </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Sarah Phelps </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> <Ul> <Li> David Evans </Li> <Li> Richard Clark </Li> <Li> Thaddeus O'Sullivan </Li> </Ul> </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United Kingdom </Td> </Tr> <Tr> <Th> Original language (s) </Th> <Td> English </Td> </Tr> <Tr> <Th> No. of series </Th> <Td> </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 6 </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> <Ul> <Li> Anne Pivcevic </Li> <Li> Sarah Phelps </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Annie Tricklebank </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 60 minutes </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> BBC Drama Production </Td> </Tr> <Tr> <Th> Distributor </Th> <Td> Endemol </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> <Ul> <Li> BBC One </Li> <Li> BBC One HD </Li> </Ul> </Td> </Tr> <Tr> <Th> Original release </Th> <Td> 6 April (2014 - 04 - 06)--11 May 2014 (2014 - 05 - 11) </Td> </Tr> <Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Td_colspan="2"> Website </Td> </Tr> </Table> <Tr> <Th_colspan="2"> The Crimson Field </Th> </Tr>

How many seasons are there of crimson field
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