TASK DEFINITION: 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'.
PROBLEM: Sentence 1:16 May - Kenneth Nelson , a member of the Royal Ulster Constabulary ( RUC ) was shot dead by the Provisional Irish Republican Army ( PIRA ) in Derryfubble , near Benburb . Sentence 2:nan

SOLUTION: SINGLE_APPOSITION

PROBLEM: Sentence 1:Although the principal focus was straight plays , he revived the melodrama -- a play with incidental music . Sentence 2:nan

SOLUTION: SINGLE_CONN_START

PROBLEM: Sentence 1:Although Ranganatha follows the theme of the Valmiki Ramayana , he still made changes in some incidents which effects the course of events . Sentence 2:nan

SOLUTION:
SINGLE_CONN_START