Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_31893 ( "Heat Rank" real, "Lane" real, "Swimmer" text, "Country" text, "Time" real, "Overall Rank" real )

### Question ###
Tell me the average heat rank with a lane of 2 and time less than 27.66

### Accurate SQL ###

SELECT AVG("Heat Rank") FROM table_31893 WHERE "Lane" = '2' AND "Time" < '27.66'