Pepin was able to unite all the Frankish realms by conquering Neustria and Burgundy.

Entity and relation annotations:
id: 0
type: entity
value: text: Pepin
labels: <Person>
id: 1
type: entity
value: text: the Frankish
labels: <Location>
id: 2
type: entity
value: text: Neustria
labels: <Location>
id: 3
type: entity
value: text: Burgundy
labels: <Location>