This sentence is an example of an **ambiguous pronoun reference**. The word "she" could logically refer to either:

- **The doctor** (she was late, so she called to inform/explain)
- **The nurse** (she was late, so the doctor called to check or address it)

Grammatically, "she" most naturally refers to the **closest preceding feminine noun**, which would be **the nurse**, and that's also the most common intuitive reading. However, the sentence is genuinely ambiguous without additional context.

This kind of example is often used in **psycholinguistics research** to study how people resolve pronoun ambiguity, including the role of gender stereotypes and syntax in interpretation.
