He was the first member of the Welf branch of the House of Este.

Entity and relation annotations:
id: 0
type: entity
value: text: the Welf branch of the House of Este
labels: <Organization>
id: 1
type: entity
value: text: the Welf branch
labels: <Organization>
type: relation
to_id: 1
labels: Organization:is_subordinate_to:Organization
from_id: 0