Complex sentence: The girl on our left smirks conspiratorially at the viewer, making us complicit in the event and the shadowy uplighting adds a sinister dimension to the scene and suggests that something unnatural is going on.
Split into simpler sentences: The girl on our left smirks conspiratorially at the viewer, making us complicit in the event. The shadowy lighting adds a sinister dimension to the scene and suggest that something unnatural is going on.