"Tian Dan" is named after Tian Dan, a general of the Warring States period.

Entity and relation annotations:
id: 0
type: entity
value: text: Tian Dan
labels: <Person>
id: 1
type: entity
value: text: the Warring States
labels: <Event>
id: 2
type: entity
value: text: "Tian Dan"
labels: <Location>
id: 3
type: entity
value: text: the Warring States period
labels: <Date>
id: 4
type: entity
value: text: general
labels: <Title>