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:The principal consecrator was Metropolitan Maxim Hermaniuk . Sentence 2:Bishop Yakymyshyn retired on June 1 , 2007 , after reaching of the age limit .
Example Output: PAIR_NONE

Example Input: Sentence 1:Ellen thinks she cost a car salesman his job , so she gets him a job at her bookstore . Sentence 2:nan
Example Output: SINGLE_S_COORD_ANAPHORA

Example Input: Sentence 1:Working in his hometown for almost two decades , he elevated the artistic and technical standards of the company dancers to a remarkable degree and created many works for ballet stages , for opera and operetta , and for television productions . Sentence 2:nan
Example Output:
SINGLE_CATAPHORA