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:During Walsall 's 2 -- 1 victory at Leeds United on 16 February 2010 he picked up a hamstring injury and he returned to the team after entering a 2 -- 0 defeat at Leyton Orient on 13 March as a 77th - minute substitute . Sentence 2:nan

SOLUTION: SINGLE_S_COORD

PROBLEM: Sentence 1:Some of these methods cause direct damage to the weeds through complete removal or causing a lethal injury . Sentence 2:nan

SOLUTION: SINGLE_VP_COORD

PROBLEM: Sentence 1:Following the November 2006 election , Giffords was sworn in as a congresswoman on January 3 , 2007 . Sentence 2:She was the third woman in Arizona 's history to be elected to serve in the U.S. Congress .

SOLUTION:
PAIR_ANAPHORA