Table: panama_intl_rankings
Columns: index_year
author_editor_source
year_of_publication
countries_sampled
world_ranking_1
ranking_l_a_2

Question: what's the author / editor / source with index (year) being press freedom (2007)
SQL: SELECT "author_editor_source" FROM panama_intl_rankings WHERE "index_year" = 'Press Freedom (2007)'

Question:  how many countries sampled with year of publication being 2007 and ranking l.a. (2) being 7th
SQL: SELECT COUNT("countries_sampled") FROM panama_intl_rankings WHERE "year_of_publication" = '2007' AND "ranking_l_a_2" = '7th'

Question: what's the author / editor / source with world ranking (1) being 73rd
SQL: SELECT "author_editor_source" FROM panama_intl_rankings WHERE "world_ranking_1" = '73rd'