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_13726 ( "Protocol" text, "Power Line" text, "Radio-Frequency" text, "Open Source?" text, "Needs Neutral Wire?" text )

### Question ###
Does Zigbee need neutral wire when the open source is yes?

### Accurate SQL ###

SELECT "Needs Neutral Wire?" FROM table_13726 WHERE "Open Source?" = 'yes' AND "Protocol" = 'zigbee'