Complex sentence: At the end of 2007, Mexican Federal District government announced the construction of a new metro line: line 12 will run towards the southeastern part of the city, connecting with lines 7,3,2 and 8 respectively.
Split into simpler sentences: At the end of 2007, Mexican Federal District government announced the construction of a new metro line: line 12. Line 12 will run towards the southeastern part of the city, connecting with lines 7,3,2 and 8 respectively.