It spread even beyond the Indian subcontinent to Central Asia and China.

Entity and relation annotations:
id: 0
type: entity
value: text: Central Asia
labels: <Location>
id: 1
type: entity
value: text: China
labels: <Location>
id: 2
type: entity
value: text: Asia
labels: <Location>
id: 3
type: entity
value: text: the Indian subcontinent
labels: <Location>
type: relation
to_id: 2
labels: Location:located_in:Location
from_id: 0