UHop: An Unrestricted-Hop Relation Extraction Framework for Knowledge-Based Question Answering
Table 6: Accuracies of models trained on PQL3 and tested on PQL2. The maximum length of relation paths for models without UHop is set to 3.
['[EMPTY]', 'HR-BiLSTM', 'ABWIM']
To evaluate if the model halts in the search process, we conducted an experiment using PQL3 as the training/validation set and PQL2 as the testing set. Within the UHop framework, both models outperform their original version by more than 7%. However, with zero 2-hop samples, it still overfits on the 3-hop length in training data, resulting in accuracies lower than 50%.