WLM MMXII-MMXV in Ukraine participant number

SQL

-- it is supposed to be counter of all participants from WLM MMXII - MMXV in Ukraine.
-- Number should count unique users and not just sum up the nums for all 4 cats
SELECT cl_from, page_title
FROM commonswiki_p.categorylinks
JOIN commonswiki_p.page ON cl_from = page_title

WHERE cl_to IN (
"Images_from_Wiki_Loves_Monuments_2012_in_Ukraine",
"Images_from_Wiki_Loves_Monuments_2013in_Ukraine",
"Images_from_Wiki_Loves_Monuments_2014_in_Ukraine",
"Images_from_Wiki_Loves_Monuments_2015_in_Ukraine"
)
LIMIT 10

SQL

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