Locate all events on devices of women under 30 years old.
locate = longitude, latitude; women refers to gender = 'F'; under 30 years old refers to age < 30;
SELECT T1.device_id FROM gender_age AS T1 INNER JOIN events_relevant AS T2 ON T1.device_id = T2.device_id WHERE T1.gender = 'F' AND T1.age < 30