Utilize the input text as a context reference, choose the right relationship between 'Covestro' and 'Bayer' from the options.
Options: distributed by, employer, chairperson, owned by

Fri, Sep 4, 2015, 11:05 BST - UK Markets close in 5 hrs 25 mins Bayer says Covestro unit to go public in Q4 AFP – 28 minutes ago View Photo
owned by