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_37898 ( "District" text, "Incumbent" text, "Party" text, "First elected" text, "Result" text )

### Question ###
Which District has a Party of republican and a Result of lost re-election democratic gain?

### Accurate SQL ###

SELECT "District" FROM table_37898 WHERE "Party" = 'republican' AND "Result" = 'lost re-election democratic gain'