Former executive directors include Penny Marks and Ward Whiting.

Entity and relation annotations:
id: 0
type: entity
value: text: Penny Marks
labels: <Person>
id: 1
type: entity
value: text: Ward Whiting
labels: <Person>
id: 2
type: entity
value: text: Former executive directors
labels: <Title>
type: relation
to_id: 2
labels: Person:holds_title:Title
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type: relation
to_id: 2
labels: Person:holds_title:Title
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