Table:
text: List of TVB series (2008)
Second line series
Second line series
Airing_date Number_of_episodes HD_format Highest_average_point_ratings Genre Official_website
22 Sep- 24 Oct 24 No 30 Costume action Official website
27 Oct- 5 Dec 30 No 29 Period drama Official website
8 Dec 2008- 2 Jan 2009 20 No 28 Modern drama Official website

text: List of TVB series (2008)
Second line series
Second line series
Airing_date Number_of_episodes HD_format Highest_average_point_ratings Genre Official_website
1 Jan- 27 Jan 20 Yes 37 Modern comedy Official website
28 Jan- 22 Feb 20 No 32 Modern drama Official website
25 Feb- 28 Mar 25 Yes 29 Period action Official website
31 Mar- 25 Apr 20 No 32 Modern drama Official website
28 Apr- 23 May 21 No 34 Costume drama Official website
26 May- 20 Jun 21 No 31 Modern drama Official website
23 Jun- 21 Jul 20 No 30 Modern drama Official website
21 Jul- 15 Aug 20 Yes 32 Modern drama Official website
25 Aug- 19 Sep 20 Yes 31 Modern drama Official website

Question: From the list of TVB series in 2008, what was the airing date of the second line series when the number of episodes was greater than 20 and the genre was costume action?

Question: Second line series 2008 genre tv series episode count if genre is modern drama for tvb series (2008) and highest average rating points is 28?