Analyze the relationship between 'Direct Line' and 'Insurance' within the context of the input sentence.
Options: brand, owner of, operator, product/material produced

Tue, Sep 8, 2015, 12:17 BST - UK Markets close in 4 hrs 13 mins Could Esure Group PLC, Direct Line Insurance Group PLC And Jardine Lloyd Thompson Group plc Be Next After Amlin plc Takeover?
product/material produced