The head of the theoretical division of the Institute was Professor Landau.

Entity and relation annotations:
id: 0
type: entity
value: text: the theoretical division of the Institute
labels: <Organization>
id: 1
type: entity
value: text: Landau
labels: <Person>
id: 2
type: entity
value: text: Professor
labels: <Title>
id: 3
type: entity
value: text: The head
labels: <Title>
type: relation
to_id: 2
labels: Person:holds_title:Title
from_id: 1
type: relation
to_id: 0
labels: Person:affiliated_with:Organization
from_id: 1
type: relation
to_id: 3
labels: Organization:Establishes:Title
from_id: 0