FIELD: physics.SUBSTANCE: invention relates to means of detecting orphaned utterances. Non-domain statement rejected by domain classifier of target language understanding system is received. Out-of-domain statement is evaluated by one or more semantics, syntax, part of speech or lexicon tag, determining whether the out-of-domain statement is a web search request or an orphan dialog system of purposeful language comprehension. It is determined that the out-of-domain statement is an orphan by: checking the evaluated out-of-domain statement on the existence of the semantic feature, wherein the semantic feature is a predicate and/or an argument; and classifying an out-of-domain statement as an orphan, when the predicate and the argument exist. Response is generated indicating that the out-of-domain statement is understood as a request for execution of a certain action addressed to a dialogue system of purposeful understanding of the language.EFFECT: technical result consists in improvement of efficiency of detection of orphan statements.14 cl, 9 dwg, 4 tbl
SYSTEM AND METHOD FOR DETECTING ORPHAN UTTERANCES