1. A method, in a data processing system comprising a processor and a memory, for performing tabular data correction in a document, the method comprising: configuring the processor to implement a natural language processing (NLP) system that performs natural language processing on natural language content at least by processing logical relationships in the natural language content; responsive to receiving a natural language document with table structures and functional dependencies identified therein: configuring an erroneous data value analysis engine to analyze a portion of content within a natural language document to identify an erroneous sub-portion within the natural language document comprising an erroneous or missing item of information; analyzing, by the erroneous data value analysis engine executed by the processor in the data processing system, a portion of content within a natural language document to identify an erroneous sub-portion within the natural language document comprising an erroneous or missing item of information, wherein the portion of content comprises a table data structure present in the natural language document, wherein the erroneous sub-portion comprises a cell in the table data structure having an erroneous or missing data value, wherein the erroneous sub-portion is identified based on the erroneous sub-portion failing to conform with a regular structure associated with the portion of content within the natural language document, and wherein the regular structure is a repeatable pattern within the portion of content within the natural language document; configuring a question generation engine to generate a semantic signature for the erroneous sub-portion; generating, by the question generation engine executed by the processor in the data processing system, the semantic signature for the erroneous sub-portion, wherein generating the semantic signature for the erroneous sub-portion comprises: performing, by the question generation engine, a discovery of functional dependencies between the erroneous or missing data value in the cell of the table data structure and a second portion of content, wherein the functional dependencies are indicated by the repeatable pattern; analyzing, by the question generation engine, context information surrounding the erroneous sub-portion of content in the natural language document utilizing the functional dependencies between the erroneous or missing data value in the cell of the table data structure and a second portion of content; and converting, by the question generation engine, the context information into a narrated statement using a narration mechanism; configuring a Question and Answer (QA) system to generate a query based on the semantic signature and apply the query to a knowledge base to identify a candidate sub-portion of content for correcting the erroneous sub-portion; generating, by the Question and Answer (QA) system executed by the processor in the data processing system, the query based on the semantic signature; applying, by the QA system, the query to the knowledge base to identify the candidate sub-portion of content for correcting the erroneous sub-portion; configuring a correction engine to correct the erroneous sub-portion to generate a corrected natural language document and store the corrected natural language document; correcting, by the correction engine executed by the processor in the data processing system, the erroneous sub-portion using the identified candidate sub-portion of content to generate the corrected natural language document; and storing, by the correction engine, the corrected natural language document in a storage device.