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 look forward to working closely with the FDA on an expedited review process for avelumab, and we hope to be able to provide a potential new treatment option for patients with this difficult-to-treat cancer in the future.” “We look forward to working with our partners at Merck on the development of avelumab in patients with relapsed and refractory Merkel cell carcinoma,” said Dr. Mace Rothenberg, Senior Vice President of Clinical Development and Medical Affairs and Chief Medical Officer for Pfizer Oncology.

Answer: manufacturer: avelumab, Pfizer