Task 11 of SemEval 2025 was proposed to develop supporting information for analyzing the risks of misinformation and propaganda in news articles. In this study, we selected Sub-task 3—which involves generating evidence explaining why a particular dominant narrative is labeled in an article—and fine-tuned PEGASUS for this purpose, achieving the best performance in the competition.

It is known that human thought can be distinguished into lateral and vertical thinking. The development of language models has thus far been focused on evaluating and advancing vertical thinking, while lateral thinking has been somewhat neglected. To foster progress in this area, SemEval has created and distributed a brainteaser dataset based on lateral thinking consist of sentence puzzles and word puzzle QA. In this paper, we test and discuss the performance of the currently known best model, Gemini, on this dataset.