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'.
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Question: Sentence 1:When Purvis was released he was unable to even play a chord and he required some months of physical therapy at the Army Rehabilitation Center in Santa Barbara , California before he could resume his career . Sentence 2:nan

Answer: SINGLE_S_COORD_ANAPHORA


Question: Sentence 1:The GMK Rekord was based on the German - designed Opel Rekord D. In August 1975 , a version of the Rekord , known as the Rekord Royale was launched by GMK . Sentence 2:nan

Answer: SINGLE_APPOSITION


Question: Sentence 1:The colors will continue to move toward the edge for a short time after the heat is removed , so the smith typically removes the heat a little early , so that the pale - yellow just reaches the edge . Sentence 2:nan

Answer:
SINGLE_CONN_INNER