Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_43 (lane INTEGER, heat VARCHAR, name VARCHAR)
### Question:
What's Sara Isakovič's lane number that had a heat of 3?
### Answer:
SELECT SUM(lane) FROM table_name_43 WHERE heat = 3 AND name = "sara isakovič"