Q: "Three dogs are searching for something outdoors." Does this mean that "There are three dogs that are 4 years old."?
A: it is not possible to tell

Q: "a group of people sitting at a sporting event." Does this mean that "The rampant fans at the stadium are walking over everyone"?
A: no

Q: "He is working in the machine all day long." Does this mean that "A lumberjack is cutting down a tree."?
A: no

Q: "A person taking a picture of group of other people." Does this mean that "A person is taking pictures of other people"?
A:
it is not possible to tell