NPCs composing that spawngroup :

a_newly_created_sentry (100%)

NPCs spawning around that spawngroup :
(Max range : 100)

sleeper_15, range=66 (-684,-46,111)

sleeper113015, range=65 (-686,-47,111)

sleeper113016, range=97 (-685,-15,111)

sleeper113051, range=65 (-687,-177,111)

sleeper113052, range=31 (-687,-143,111)

sleeper113054, range=32 (-686,-80,111)