SELECT
  x.value.string_value AS lat,
  y.value.string_value AS lon,
  geo.city
FROM
  `apps.analytics_185684181.*`,
  UNNEST(user_properties) AS x,
  UNNEST(user_properties) AS y,
  UNNEST(user_properties) AS z
WHERE
  x.key="user_loc_lat"
  AND y.key="user_loc_lon"
  AND event_name='event_name'
  AND (_TABLE_SUFFIX BETWEEN 'events_20190301'
    AND 'events_20190331')