Assertion: mortar | /r/HasProperty | designated the m1 chemical mortar
Facets:
Source sentences:
text: The first 4.2-inch mortar in U.S. service was introduced in 1928 and was designated the M1 Chemical Mortar.
text: The first 4.2-inch mortar in U.S. service was introduced in 1928 and was designated the M1 Chemical Mortar.