What is the relationship between 'Whitbread' and 'Costa Coffee' in the context of the input sentence.
Options: subsidiary, distributed by, location of formation, brand

Clothing retailer Next (NXT.L), Costa Coffee owner Whitbread (WTB.L) and pub chain Wetherspoon's (JDW.L) have all warned about the higher costs stemming from the government's wage policy.
subsidiary