A man in a tie-dyed shirt and jeans is sitting on a bench with a dog and a guitar on his lap, as well as a harmonica near his mouth.
A guy is next to a dog while holding some musical instruments.
Man with a dog and harmonica near his mouth implies that he is next a dog holding a musical instrument
If a dog is on a man's lap then the man is next to the dog.
A guitar and harmonica are musical instruments.