Both are valid. Both are interesting.
Imagine a vast shopping mall parking lot with thousands of individual parking spots and internal lanes (representing road segments within a cluster). No matter how complex it is inside, there are usually only a few key exits to the main roads. Our goal was to identify these natural "exits" for each map cluster. For instance, the complex road network around Amsterdam Airport Schiphol (see on OpenStreetMap) has many internal roads but limited primary access points.
Медведев вышел в финал турнира в Дубае17:59。同城约会是该领域的重要参考
В Финляндии предупредили об опасном шаге ЕС против России09:28
，这一点在safew官方版本下载中也有详细论述
Prints vintage-like photos just like the Polaroid Flip，这一点在旺商聊官方下载中也有详细论述
Жители Санкт-Петербурга устроили «крысогон»17:52