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_29515 ( "Year" text, "Summits" text, "Country" text, "Continent" text, "Elevation ft" real, "Elevation m" real )

### Question ###
what was the lowest elevation in april 2006?

### Accurate SQL ###

SELECT MIN("Elevation ft") FROM table_29515 WHERE "Year" = 'April 2006'