Assertion: mortar | /r/HasProperty | caliber mortars
Facets:
value: next to the monster mortar
type: OTHER
Source sentences:
text: Next to the Monster Mortar, the largest mortars ever developed were two 36 inches (914 mm) caliber mortars: Mallet's Mortar, designed by Robert Mallet and tested by the Woolwich Arsenal, London, in 1857; and "Little David" developed in the United States for use in World War II.