McGovern campaign manager Gary Hart suggested Boston Mayor Kevin White.

Entity and relation annotations:
id: 0
type: entity
value: text: McGovern
labels: <Person>
id: 1
type: entity
value: text: campaign manager
labels: <Title>
id: 2
type: entity
value: text: Gary Hart
labels: <Person>
id: 3
type: entity
value: text: Kevin White
labels: <Person>
id: 4
type: entity
value: text: Boston Mayor
labels: <Title>
type: relation
to_id: 1
labels: Person:holds_title:Title
from_id: 2
type: relation
to_id: 4
labels: Person:holds_title:Title
from_id: 3
type: relation
to_id: 2
labels: Person:business/work:Person
from_id: 0
type: relation
to_id: 3
labels: Person:business/work:Person
from_id: 2