Maxim's is featured in Lehar's opera, "The Merry Widow".

Entity and relation annotations:
id: 0
type: entity
value: text: Maxim
labels: <Person>
id: 1
type: entity
value: text: "The Merry Widow"
labels: <Work_of_art>
id: 2
type: entity
value: text: Lehar
labels: <Person>
type: relation
to_id: 1
labels: Person:performs:Work_of_art
from_id: 0
type: relation
to_id: 1
labels: Person:is_character_in:Work_of_art
from_id: 2