Tell the number of surveys that contained the question “What country do you work in?”.
question refers to questiontext
SELECT COUNT(DISTINCT T1.QuestionID) FROM Answer AS T1 INNER JOIN Question AS T2 ON T1.QuestionID = T2.questionid INNER JOIN Survey AS T3 ON T1.SurveyID = T3.SurveyID WHERE T2.questiontext = 'What country do you work in?'