Refer to the input text as context and select the correct relationship between 'Polly Pocket' and 'Mattel' from the available options.
Options: currency, chairperson, distributed by, director/manager

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").
distributed by