This photo of a harpist by Emily Barklage is a nice example of street photography. The challenge with street photography is that you have to work with what you have, and often can't do much about the background or surroundings. With that in mind, I have a couple of ideas to try next time. You might have moved a bit to your left and captured the image without the black object in the left of the frame. Also maximize the potential of your equipment. Between the wonderful daylight and your lens with a maximum aperture of f/2.8, open up your aperture. With your aperture open even to f/3.5 the background would have blurred nicely. Then you could crop this differently, go vertical, you would get the harpist playing, a less distracting background and the black object goes out of frame.