old_contents: from django.conf.urls import url
  from . import views
  
  urlpatterns = [
      url(r'^question_set_list/', views.http_list_question_sets),
      url(r'^answer_set/', views.http_create_answer_set),
      url(r'^answer/', views.create_answer),
      url(r'^question/', views.get_question),
      url(r'^contour_tile/(?P<question_id>\d+)', views.contour_tile),
      url(r'^map_area/', views.create_map_area),
      url(r'^question_set/', views.create_question_set),
  ]
  
new_contents: from django.conf.urls import url
  from . import views
  
  urlpatterns = [
      url(r'^question_set_list/', views.question_set_list),
      url(r'^answer_set/', views.create_answer_set),
      url(r'^answer/', views.create_answer),
      url(r'^question/', views.get_question),
      url(r'^contour_tile/(?P<question_id>\d+)', views.contour_tile),
      url(r'^map_area/', views.create_map_area),
      url(r'^question_set/', views.create_question_set),
  ]
  
subject: Fix bugs in maps/api/urls