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:The IFSD , a joint partnership led by Scottish Enterprise and Glasgow City Council , has created almost two million square feet of new Grade ' A ' office accommodation in the centre of the city . Sentence 2:nan
Example Output: SINGLE_APPOSITION

Example Input: Sentence 1:Starting in 1955 , he served the University of the West Indies ( UWI ) as a lecturer in adult education and as a professor of Spanish and director of the Extra-Mural Studies Department . Sentence 2:nan
Example Output: SINGLE_CATAPHORA

Example Input: Sentence 1:Laodice claimed that Antiochus had named her son heir while on his deathbed , but Berenice argued that her newly born son was the legitimate heir . Sentence 2:nan
Example Output:
SINGLE_S_COORD