Complex sentence: ORP "Jaskółka" was one in a series of Pre-World War II Polish minelayers the others being, "Rybitwa", "Czapla", "Mewa", "Czajką", "Żuraw" all of them being named after birds.
Split into simpler sentences: ORP "Jaskółka" was one in a series of Pre-World War II Polish minelayers. Other minelayers include, the "Rybitwa", "Czapla", "Mewa", "Czajką", and "Żuraw"--all of which were named after birds.