无法根据其类别制作无序列表

Question

表格如下：

category_amenities表如下：

我提出了这个问题：

`SELECT amenities.subcategory from amenities inner join category_amenities 
on amenities.category=category_amenities.name 
where amenities.category= 
(select distinct category_amenities.name from category_amenities 
inner join amenities on category_amenities.name = amenities.category where category_amenities.name = 'Parking');`

然后我得到了这个输出：

Facilities
   Street Parking
   Bus Parking
   Complimentary Parking
   Paid Parking
   Valet Parking
Parking
 Street Parking
 Bus Parking
 Complimentary Parking
 Paid Parking
 Valet Parking

请告诉我如何获得如下输出：

 Facilities
   Onsite restaurant

Parking
   Street Parking
   Bus Parking
   Complimentary Parking
   Paid Parking
   Valet Parking

我需要更正上面的查询。