A researcher is preparing data for a unified text-to-text model. To have the model perform a question-answering task, the input data must be structured as a single text string that begins with a specific instruction, followed by the question itself. Based on this requirement, which of the following examples is formatted correctly to serve as the model's input?

Formatting a Training Sample for a Text-to-Text Model

Analyzing an Incorrect T5 Question-Answering Sample