claim: Alina Cojocaru is a principal dancer with a group. Doctor Ox's Experiment (opera) was first performed in the venue in St. Martin's Lane which often hosts Cojocaru's group.
supporting_facts.key: English National Ballet
supporting_facts.key: London Coliseum
supporting_facts.key: Alina Cojocaru
supporting_facts.key: Doctor Ox's Experiment (opera)