Methods for retrieval of implicit logical-semantic relations from monolingual texts

The paper focuses on the problem of targeted retrieval of fragments with implicit logical-semantic relations (LSRs) from monolingual natural language texts. In order to answer the question whether such retrieval is possible, a survey of works with the results of implicit LSRs studies has been conducted. The aim of the survey is to identify the methods used in these works to create arrays of text fragments with implicit LSRs. It was revealed that mainly two methods are used: ($i$) automatic generation of fragments with implicit LSRs using fragments with explicit LSRs; and ($ii$) exporting of fragments with implicit LSRs from manually annotated text corpora. Neither of these techniques can be considered as a retrieval method because they do not imply detection of fragments with implicit LSRs in the natural language text and their subsequent extraction. Therefore, it can be stated that for monolingual texts, the task of targeted retrieval of such fragments currently remains unsolved.