Analogy between Span Length Prediction and Fertility Modeling

A language model is tasked with filling in a masked portion of text. The input provided is: 'The solar system consists of the Sun and the [MASK] that orbit it.' The original, unmasked text was: 'The solar system consists of the Sun and the celestial bodies that orbit it.' The model, however, generates the following output: 'The solar system consists of the Sun and the planets that orbit it.' Which statement provides the most accurate analysis of the model's primary error in this specific case?

The Variable-Length Prediction Problem

Diagnosing a Model's Infilling Errors