Utilize the input text as a context reference, choose the right relationship between Polly Pocket and Mattel 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.

Mattel Girls & Boys Brands-including Barbie fashion dolls and accessories ("Barbie"), Monster High, Disney Classics, Ever After High, Little Mommy, and Polly Pocket (collectively "Other Girls"), Hot Wheels and Matchbox vehicles and play sets (collectively "Wheels"), and CARS, Disney Planes, BOOMco, Radica, Toy Story, Max Steel, WWE Wrestling, Batman, and games and puzzles (collectively "Entertainment").

Answer: distributed_by