name the tv show whose opening theme is sammi cheng and the subsequent work is return of the cuckoo ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_openingTheme dbr_Sammi_Cheng sep_dot var_uri dbo_subsequentWork dbr_Return_of_the_Cuckoo sep_dot var_uri a dbo_TelevisionShow brack_close