สถานที่ท่องเที่ยวที่อลิสันไปเยี่ยมแต่โรซาลินด์ไม่ได้ไปชื่ออะไร
What are the names of tourist attraction that Alison visited but Rosalind did not visit?
df_visits = pd.DataFrame(columns=['Tourist_Attraction_ID', 'Tourist_ID']); df_visitors = pd.DataFrame(columns=['Tourist_Details', 'Tourist_ID']); df_tourist_attrs = pd.DataFrame(columns=['Name', 'Tourist_Attraction_ID']);
df_tourist_attrs[df_tourist_attrs['Tourist_Attraction_ID'].isin(df_visits[df_visits['Tourist_ID'].isin(df_visitors[df_visitors['Tourist_Details'] == 'Alison']['Tourist_ID']) & ~df_visits['Tourist_ID'].isin(df_visitors[df_visitors['Tourist_Details'] == 'Rosalind']['Tourist_ID'])]['Tourist_Attraction_ID'])]['Name']