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GNNs & Transformers: 50th Post on this Blog! In AI, Graph Neural Networks (GNNs) and Transformers are both widely used but they are designed for different types of data and problems. GNNs are designed to work with graph-structured data. For example, recommendation systems (users connected to products). GNNs work by passing messages between connected nodes. Each node updates its representation (vector) based on information from its neighbors. Transformers are neural networks d