Complex sentence: The 2010 Moscow Metro bombings were two suicide bombings initiated by female terrorists that occurred during the morning of 29 March 2010 inside the Moscow Metro station Lubyanka and 40 minutes later at Park Kultury station.
Split into simpler sentences: The 2010 Moscow Metro bombings were two suicide bombings initiated by female terrorists that occurred during the morning of 29 March 2010. The first happened inside the Moscow Metro station Lubyanka and the second 40 minutes later at Park Kultury station.