Analyze the relationship between 'Costa Coffee' and 'Whitbread' within the context of the input sentence.
Options: currency, parent organization, founded by, owned by

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.
parent organization