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_28853064_15 ( winner VARCHAR, mountains_classification VARCHAR, team_classification VARCHAR )

### Question ###
Who were the winners if the Mountain Classification award was given to Oscar Solis and Team Classification was given to EPM-Une?

### Accurate SQL ###

SELECT winner FROM table_28853064_15 WHERE mountains_classification = "Oscar Solis" AND team_classification = "EPM-UNE"