In this task, you are given two sentences in the English language and your task is to classify them into one of their discourse types. A discourse type is an indicator to classify the given two sentences on the basis of a co-text as well as a relevant context. There are 13 discourse types in total which are 'SINGLE_S_COORD', 'SINGLE_CATAPHORA', 'SINGLE_CONN_INNER', 'SINGLE_APPOSITION', 'SINGLE_VP_COORD', 'SINGLE_CONN_START', 'PAIR_ANAPHORA', 'PAIR_CONN', 'SINGLE_RELATIVE', 'SINGLE_CONN_INNER_ANAPHORA', 'SINGLE_S_COORD_ANAPHORA', 'PAIR_CONN_ANAPHORA' and 'PAIR_NONE'.

Sentence 1:Although Bolton worked mostly in the West End in the 1930s , his biggest hit of the decade began on Broadway , a collaboration with his old friend Wodehouse , who had by then largely abandoned the theatre for novel - writing . Sentence 2:nan
SINGLE_CONN_START

Sentence 1:Interstate 520 ( I - 520 ) is a 23.34 - mile - long ( 37.56 km ) auxiliary route from Augusta , Georgia to North Augusta , South Carolina . Sentence 2:Approximately 16.14 miles ( 25.97 km ) of the highway is in Georgia .
PAIR_NONE

Sentence 1:She was one of the Hampton Court Beauties and was the daughter of Sir Thomas Whitmore of Bridgnorth and his wife Hon . Sentence 2:nan

SINGLE_S_COORD