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'.

Sentence 1:Although this did not materially affect the planning of the expedition , it was to have significant consequences on the frontier . Sentence 2:nan
SINGLE_CONN_START

Sentence 1:Mordechai Omer also described Zaritsky 's use of light in his paintings and suggests that in these paintings the light is not perceived as a tonal problem . Sentence 2:In fact , Omer claims , Zaritsky left the objects in the paintings unnuanced. ( 12 )
PAIR_CONN

Sentence 1:The exposer 's suspicion arises because visions of history are created usually by the winners ' chroniclers . Sentence 2:Therefore , what is under the fresco Przemiany Liwiusza ( Transformations of Livy ) should be analyzed diligently .

PAIR_CONN