He was an uncle of Belarusian poet and writer Jakub Kolas.

Entity and relation annotations:
id: 0
type: entity
value: text: Jakub Kolas
labels: <Person>
id: 1
type: entity
value: text: Belarusian poet
labels: <Title>
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type: entity
value: text: writer
labels: <Title>
type: relation
to_id: 2
labels: Person:holds_title:Title
from_id: 0
type: relation
to_id: 1
labels: Person:holds_title:Title
from_id: 0