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'.

Example Input: Sentence 1:Solomon , an attorney with a previous career in business , started as a health - care advocate in 1992 when her son was diagnosed with type 1 diabetes . Sentence 2:nan
Example Output: SINGLE_APPOSITION

Example Input: Sentence 1:At the first IPC Alpine Skiing World Cup event in the 2008/2009 ski season , which was held at La Molina in Spain , Boira finished fourth overall . Sentence 2:nan
Example Output: SINGLE_RELATIVE

Example Input: Sentence 1:Working at the ' home front ' during The Blitz , she spent many nights moving very ill children and babies from their beds to safer underground shelters . Sentence 2:nan
Example Output:
SINGLE_CATAPHORA