PERSON@1 -LRB- born NUMBER@1 January NUMBER@2 -RRB- , known as PERSON@2 , is the British Member of ORGANIZATION@1 for PERSON@3 and , since NUMBER@3 December , NUMBER@4 , leader of the Liberal Democrats .

PERSON@1 -LRB- born NUMBER@1 January NUMBER@2 -RRB- , known as PERSON@2 , is an MISC@1 politician and , since NUMBER@3 December NUMBER@4 , leader of the Liberal Democrats .
