What is the number of participating parties when registered voters totaled 643629?
CREATE TABLE table_2676980_4 (participating_parties VARCHAR, registered_voters VARCHAR)
SELECT COUNT(participating_parties) FROM table_2676980_4 WHERE registered_voters = 643629
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2676980_4 (participating_parties VARCHAR, registered_voters VARCHAR) Question: What is the number of participating parties when registered voters totaled 643629? [/INST] SELECT COUNT(participating_parties) FROM table_2676980_4 WHERE registered_voters = 643629 </s>