In this sentence, the pronoun **"she" is syntactically ambiguous**, meaning it could refer to either the doctor or the nurse.

Depending on the context or your assumptions, there are two ways to interpret it:

1.  **The nurse was late:** This is the most common interpretation. The doctor is calling the nurse to check on her or reprimand her because she hasn't arrived yet.
2.  **The doctor was late:** The doctor is calling the nurse to let her know that he/she is running behind schedule and might be late for an appointment or shift.

Because both the doctor and the nurse are referred to with the same gendered pronoun (she), the sentence is a classic example of a "Winograd Schema," where the specific meaning often depends on world knowledge or additional context.
