instruction:
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'.
question:
Sentence 1:La Tribuna ( in Spanish ) . Sentence 2:2009 - 11 - 02 .
answer:
PAIR_NONE


question:
Sentence 1:As a result , Ibrahim Khan invited Mr. Charnock back to Bengal ; but Mr. Charnock refused to come back until a specific Firman with terms and conditions clearly specified was issued by the Emperor so that they would not be subjected to further humiliations . Sentence 2:nan
answer:
SINGLE_CONN_INNER_ANAPHORA


question:
Sentence 1:Neuroblastoma is an aggressive cancer of immature neuroblastic cells ( precursors of neurons ) , and is one of the most common pediatric cancers , with a median age at diagnosis of two years . Sentence 2:nan
answer:

SINGLE_S_COORD