A language model was fine-tuned with a dataset consisting exclusively of instructions in two formats: 'Translate the following English text to French: [text]' and 'Summarize this article: [article]'. After training, the model performs perfectly on instructions matching these formats. However, when given the new prompt, 'Can you briefly explain the main points of this article and then provide a French translation of your explanation?', the model only provides a summary and does not attempt the translation. Based on this outcome, analyze the most likely reason for the model's partial failure. What fundamental challenge in training helpful models does this scenario illustrate?