Complex sentence: In her artist statement she had said that she didn't know what to do with herself and just as Sophie Calle chose to "shadow" random strangers in her work Suite Venitienne, she had chosen to "shadow" a random artist.
Split into simpler sentences: In her artist statement she had said that she didn't know what to do with herself. She thought that just as Sophie Calle chose to "shadow" random strangers in her work Suite Venitienne, she had chosen to "shadow" a random artist.