Table: tvb_series_1995
Columns: airing_date
english_title_chinese_title
number_of_episodes
theme_song_t_sub_theme_song_st
genre

Question: Which Airing date has a Number of episodes larger than 20, and a Genre of modern drama?
SQL: SELECT "airing_date" FROM tvb_series_1995 WHERE "number_of_episodes" > 20 AND "genre" = 'modern drama'

Question: Which Genre has an English title (Chinese title) of the romance of the white hair maiden 白髮魔女傳?
SQL: SELECT "genre" FROM tvb_series_1995 WHERE "english_title_chinese_title" = 'the romance of the white hair maiden 白髮魔女傳'