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:Returning to France the next year in the company of Wescott and Wheeler , he traveled around Europe for the next several years , always with his camera at hand . Sentence 2:nan

SOLUTION: SINGLE_CATAPHORA

PROBLEM: Sentence 1:La Tribuna ( in Spanish ) . Sentence 2:2009 - 11 - 02 .

SOLUTION: PAIR_NONE

PROBLEM: Sentence 1:The patients , who were rigid and almost completely immobile , responded to levodopa treatment . Sentence 2:nan

SOLUTION:
SINGLE_RELATIVE