Complex sentence: The Local Bubble is a cavity in the interstellar medium (ISM) in the Orion Arm of the Milky Way which contains, among others, the Local Interstellar Cloud and G-cloud.
Split into simpler sentences: The Local Bubble is a cavity in the interstellar medium (ISM) in the Orion Arm of the Milky Way. It contains, among others, the Local Interstellar Cloud and G-cloud.