Assertion: artillery's gun | /r/CapableOf | defend fixed line
Facets:
Source sentences:
text: Two distinct forms of artillery developed: the towed gun, which was used primarily to attack or defend a fixed line; and the self-propelled gun, which was designed to accompany a mobile force and provide continuous fire support.
text: Two distinct forms of artillery were developed: the towed gun, which was used primarily to attack or defend a fixed-line; and the self-propelled gun, which was designed to accompany a mobile force and provide continuous fire support and/or suppression.