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:He concedes , however , that change is difficult because equal segments of Puerto Ricans desire statehood or continuation of the status quo . Sentence 2:nan
Example Output: SINGLE_CONN_INNER

Example Input: Sentence 1:In 1757 he succeeded his elder brother as the 7th Baron Digby but as this was an Irish peerage it did not entitle him to sit in the British House of Lords and did not force him to resign his seat in the House of Commons . Sentence 2:nan
Example Output: SINGLE_S_COORD

Example Input: Sentence 1:VAI had dealt with technical solutions for building plants for iron , steel and aluminum , while Siemens made electrotechnical equipment . Sentence 2:nan
Example Output:
SINGLE_CONN_INNER