Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Fagus Factory in Alfeld' has mentioned 'Keep' in the following places:
Occurrence Sentence Text Source
"The role of the walls becomes restricted to that of mere screens stretched between the upright columns of the framework to keep out rain, cold and noise"[2]
During construction, Gropius and his partner Meyer were under great pressure to keep up to the rhythm of work.
By winter 1912 it was clear that the factory could not keep up with the number of orders and a major expansion was decided.