Utilize the input text as a context reference, choose the right relationship between avelumab and Pfizer from the options. 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.

Furthermore, the combination trial of BXCL701, bempeg from Nektar and avelumab from Pfizer and Merck KGaA in second-line pancreatic cancer, will start following the completion of Nektar and Pfizer Phase Ib safety study of bempeg and avelumab and the outcome of that trial.

Answer: manufacturer