How many apps were last updated in January of 2018? Please write one translated review with positive sentiment for each app, if there's any.
updated in January of 2018 refers to Last Updated BETWEEN 'January 1, 2018' and 'January 31, 2018';
SELECT DISTINCT Translated_Review FROM user_reviews WHERE App IN ( SELECT App FROM playstore WHERE `Last Updated` BETWEEN 'January 1, 2018' AND 'January 31, 2018' ) AND Sentiment = 'Positive'
database name:db_id app_store
googleplaystore table googleplaystore Cols: App dtype text, Category dtype text, Rating dtype real, Reviews dtype integer, Size dtype text, Installs dtype text, Type dtype text, Price dtype text, Content Rating dtype text, Genres dtype text, 
googleplaystore_user_reviews table googleplaystore_user_reviews Cols: App dtype text, Translated_Review dtype text, Sentiment dtype text, Sentiment Polarity dtype text, Sentiment Subjectivity dtype text, 
