It was a government-sponsored team originally composed mainly of Mystique's Brotherhood of Evil Mutants.

Entity and relation annotations:
id: 0
type: entity
value: text: Mystique
labels: <Person>
id: 1
type: entity
value: text: Brotherhood of Evil Mutants
labels: <Organization>
type: relation
to_id: 1
labels: Person:leads_NORP:Organization
from_id: 0