Complex sentence: In 2001 and 2002, the China Academy of Urban Planning and Design proposed that two "L-shaped" lines named Line 10 and 11 that will with together form a second loop around Beijing and relive traffic demand on line 2.
Split into simpler sentences: In 2001 and 2002, the China Academy of Urban Planning and Design proposed that two "L-shaped" lines named Line 10 and 11. Together they will form a second loop around Beijing and relive traffic demand on line 2.