Give a list of proper nouns in the passage.
Kendall Boiler and Tank Company Building is a one-story commercial edifice located on 275 Third Street in Kendall Square, Cambridge, Massachusetts. The brick building was formerly owned by the Kendall Boiler and Tank Company and is part of the Blake and Knowles Steam Pump Company National Register District, on the National Register of Historic Places.
Kendall Boiler and Tank Company Building
Third Street
Kendall Square
Cambridge
Massachusetts
Kendall Boiler and Tank Company
Blake and Knowles Steam Pump Company National Register District
National Register of Historic Places
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Kendall Boiler and Tank Company Building is a one-story commercial edifice located on 275 Third Street in Kendall Square, Cambridge, Massachusetts. The brick building was formerly owned by the Kendall Boiler and Tank Company and is part of the Blake and Knowles Steam Pump Company National Register District, on the National Register of Historic Places.
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Answer the following query.
Give a list of proper nouns in the passage.

user
Kendall Boiler and Tank Company Building
Third Street
Kendall Square
Cambridge
Massachusetts
Kendall Boiler and Tank Company
Blake and Knowles Steam Pump Company National Register District
National Register of Historic Places
assistant