Find details about the 'Silence Was Golden' project on Public Delivery. Specifically, identify its primary origin location, describe the type of art project it is, state how many people have participated so far, and confirm if it is still open for new participants.
Navigate to 'publicdelivery.org' Click on the 'Projects' link in the navigation menu. On the 'Projects' page, click on the 'Silence Was Golden' project link. Scroll down the 'Silence Was Golden' project page to locate the project description. Identify the primary location mentioned for the project's origin. Determine the nature of the project (e.g., ongoing, performance series). Locate the approximate number of participants. Ascertain if the project is open for new participants. Synthesize the gathered information into a concise answer.
Successfully navigate to the 'Silence Was Golden' project page. State that the project originated in 'Australia, Sydney, Sydney Opera House'. Describe the project's nature as an 'on-going global performance series'. State that 'thousands of people have taken part'. Confirm that the project is 'open and free to participate'.