new_contents: infile = "test.json"
  
  fmax = 0
  lmax = 0
  
  flist = []
  llist = []
  
  for line in open(infile):
      if "position" in line:
          content = line.strip().split(":")[-1].strip()[:-1]
          first, last = map( float, content.replace("\"", "").split("-"))
          flist.append(first)
          llist.append(last)
  
  print max(flist), min(flist), max(llist), min(llist)
  
  
subject: check how big is the graph