How to parse all specific items on web-page

I am learning Google Maps Api and Javascript. Now I'm into markers and clastering.

I have a web-page, which has a list of doctors (about 80 pages in list, 10 doctors per one page). Each doctor has a name, address, field, etc. Also the page consists Google map with markers of few of doctors. The site is: http://ift.tt/2v0CsCh

I need to parse info about all the doctor and store them into to JSON file. So then I can put them all to one map and cluster. What JS features would you recommend?