know of|knows of

我听说过车站附近有一家好餐厅。

I ___know ___of a good restaurant near the station.

她听说过几位能帮助这个项目的专家。

She ___knows ___of a few experts who could help with the project.

你听说过这个地区有什么可靠的管道工吗？

Do you ___know ___of any reliable plumbers in the area?