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:Fox was initially employed at $500.00 per year by the US Navy as a clerk draftsman working under Naval Constructor Joshua Humphreys at Philadelphia Naval Shipyard . Sentence 2:Humphreys was the designer of the first Navy frigates .

SOLUTION: PAIR_ANAPHORA

PROBLEM: Sentence 1:They have very little offensive capability but they have sharp teeth that can bite through steel cable and inflict nasty wounds . Sentence 2:nan

SOLUTION: SINGLE_S_COORD

PROBLEM: Sentence 1:Environmental values are usually less dominant in the decision - making process . Sentence 2:Thus , the main motivation for actions is self - interest rather than altruistic .

SOLUTION:
PAIR_CONN