Complex sentence: The test is said to have taken place from a sea-based platform rather than a submarine; it came after the North conducted a land-based ejection test of the KN-11 from a static launcher in November 2014.
Split into simpler sentences: The test is said to have taken place from a sea-based platform rather than a submarine. The flight test came after the North conducted a land-based ejection test of the KN-11 from a static launcher in November 2014.