Give me the big city with the largest fiscal/tax revenue located in the region of Metro Manila.
select ?ent where { ?ent wdt:P31 wd:Q1549591 . ?ent wdt:P3087 ?obj . ?ent wdt:P131 wd:Q13580 } ORDER BY DESC(?obj)LIMIT 5 
big city: Q1549591 metro manila: Q13580