Complex sentence: On June 29, after flying 362 orbits docked with Salyut, the Soyuz 11 crew transferred back to Soyuz 11, and re-entered the Earth's atmosphere, however the crew were killed on descent by a cabin pressure leak.
Split into simpler sentences: On June 29, after flying 362 orbits docked with Salyut, the Soyuz 11 crew transferred back to Soyuz 11 and re-entered the Earth's atmosphere. The crew, however, was killed on descent by a cabin pressure leak.