Complex sentence: These action committees, validated by Student Assemblies (held in venues with a maximum capacity much lower than the size of the student bodies) in September 2009 and again in April 2010, have played a key role in the 2010 UPR-RP strikes.
Split into simpler sentences: These action committees were validated by Student Assemblies (held in venues with a maximum capacity much lower than the size of the student bodies), in September 2009 and again in April 2010. These committees have played a key role in the 2010 UPR-RP strikes.