Montreal Coach Don Matthews had previously won five Grey Cup championships.

Entity and relation annotations:
id: 0
type: entity
value: text: Don Matthews
labels: <Person>
id: 1
type: entity
value: text: Montreal
labels: <Location>
id: 2
type: entity
value: text: Coach
labels: <Title>
id: 3
type: entity
value: text: Grey Cup championships
labels: <Title>
type: relation
to_id: 2
labels: Person:holds_title:Title
from_id: 0
type: relation
to_id: 3
labels: Person:holds_title:Title
from_id: 0