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* Add knowledge graph module * Fix type hint * Add graph retriver module * Change type annotations, change return format * Add graph retriever that executes questions as sparql queries * Linking only those entities that are in the knowledge graph * Added logging and using relations extracted from Knowledge graph for linking * Preventing entity linking from linking the same token to multiple entities * Pruning triples that have no variables for select and count queries * Support knowledge graphs with Pipelines * Add text2sparql * Entity linking and relation linking consider more special cases now based on evaluation on labelled data * Separating example code from KGQA implementation * Add eval on combined extarctive and kg questions * Remove references to hp-test * Add fields sparql_query and long_answer_list to metadata * Removing modular Question2SPARQL approach * Removing additional classes used for modular kgqa approach * preparing lcquad data * change graph db * Translating namespaces in knowledge graph queries * Creating graphdb index and loading triples from .ttl file * Fetching graph config files, triples and model from S3 * Fix incompatibility issues with BaseGraphRetriever and BaseComponent * Removing unused utility functions * Adding doc strings and tutorial header * Adding sparqlwrapper dependency * Moving tutorial header * Sorting tutorials by number within name of notebook * Add latest docstring and tutorial changes * Creating test cases for knowledge graph * Changing knowledge graph example to harry potter * Add latest docstring and tutorial changes * Adapting the tutorial notebook to harry potter example * Add GraphDB fixture for tests * Add latest docstring and tutorial changes * Added GraphDB docker launch to CI * Use correct GraphDB fixture * Check if GraphDB instance is already running * Renaming question/query and incorporating other feedback from Timo and Tanay * Removed type annotation * Add latest docstring and tutorial changes Co-authored-by: oryx1729 <oryx1729@protonmail.com> Co-authored-by: Timo Moeller <timo.moeller@deepset.ai> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>