Q: "3 man are playing music together consisting of guitar, violin and banjo." Does this mean that "There are people playing music."?
A: yes

Q: "On a wooden structure before a yellowed grassland, youths open garbage bags." Does this mean that "the youths are working"?
A: it is not possible to tell

Q: "People are reading magazines inside a room." Does this mean that "The people are playing football outside."?
A: no

Q: "a snowboarder jumps over a pile of snow." Does this mean that "Snowboarder taking a rest in bed"?
A:
no