How many countries were sampled in the index created by The Economist, published in 2007 and ranked 2nd in the LA Ranking?
CREATE TABLE table_19948664_1 (countries_sampled INTEGER, ranking_la__2_ VARCHAR, author___editor___source VARCHAR, year_of_publication VARCHAR)
SELECT MAX(countries_sampled) FROM table_19948664_1 WHERE author___editor___source = "The Economist" AND year_of_publication = "2007" AND ranking_la__2_ = "2nd"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_19948664_1 (countries_sampled INTEGER, ranking_la__2_ VARCHAR, author___editor___source VARCHAR, year_of_publication VARCHAR) Question: How many countries were sampled in the index created by The Economist, published in 2007 and ranked 2nd in the LA Ranking? [/INST] SELECT MAX(countries_sampled) FROM table_19948664_1 WHERE author___editor___source = "The Economist" AND year_of_publication = "2007" AND ranking_la__2_ = "2nd" </s>