Given phrases that describe the relationship between two words/phrases as options, extract the word/phrase pair and the corresponding lexical relationship between them from the input text. The output format should be "relation1: word1, word2; relation2: word3, word4". Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

We will also continue to focus on last mile residential optimization by directing certain U.S. day-definite residential and rural FedEx Express shipments into the FedEx Ground network to increase efficiency and lower our cost to serve.

Answer: subsidiary: FedEx, FedEx Express; subsidiary: FedEx, FedEx Ground; parent_organization: FedEx Ground, FedEx; parent_organization: FedEx Express, FedEx