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We closely compare the accuracy of multidimensional potential energy surfaces ( PESs ) generated by the recently developed explicitly correlated coupled cluster ( CCSD ( T ) - F12 ) methods in connection with the cc - pVXZ - F12 ( X = D , T ) and aug - cc - pVTZ basis sets and those deduced using the well - established orbital - based coupled cluster techniques employing correlation consistent atomic basis sets ( aug - cc - pVXZ , X = T , Q , 5 ) and extrapolated to the complete basis set ( CBS ) limit .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
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