Complex sentence: Staphylococcus aureus is a facultative anaerobic gram-positive coccal (round shaped) bacterium that appears in grape-like clusters when viewed under a microscope.
Split into simpler sentences: Staphylococcus aureus is a facultative anaerobic Gram-positive coccal bacterium. It is a round-shaped (coccus) organism that appears in grape-like clusters when viewed under a microscope.