Q: "Officer holding a loaded shotgun to the ground." Does this mean that "The gun is loaded and he is being careful."?
A: it is not possible to tell

Q: "A brown dog swims in the murky water." Does this mean that "The dog accidentally fell in the water."?
A: it is not possible to tell

Q: "There is a group of people dressed in blue one is vacuuming a carpet." Does this mean that "People dressed in blue vacuuming a carpet"?
A: yes

Q: "A boy in a blue shirt plays the cello while a girl plays a drum." Does this mean that "Some people are playing music."?
A:
yes