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_70727 ( "Artist" text, "Country of origin" text, "Period active" text, "Release-year of first charted record" real, "Genre" text, "Claimed sales" text )

### Question ###
What is the Genre, when the Release-year of first charted record is 1968, and when the Country of origin is United States?

### Accurate SQL ###

SELECT "Genre" FROM table_70727 WHERE "Release-year of first charted record" = '1968' AND "Country of origin" = 'united states'