Table:
text: Athletics at the 2008 Summer Olympics – Women's 400 metres hurdles
Round 1
Round 1
Rank_ Heat Name_ Nationality Result_
1 3 Melaine Walker Jamaica 54.46
2 4 Ekaterina Bikert Russia 55.15
3 3 Anastasiya Rabchenyuk Ukraine 55.18
4 2 Tasha Danvers Great Britain 55.19
5 3 Tsvetelina Kirilova Bulgaria 55.22
6 2 Anastasiya Ott Russia 55.34
7 4 Anna Jesień Poland 55.35
8 1 Tiffany Ross-Williams United States 55.51
9 1 Irina Obedina Russia 55.71
10 2 Nickiesha Wilson Jamaica 55.75
11 1 Satomi Kubokura Japan 55.82
12 4 Zuzana Hejnová Czech Republic 55.91
13 3 Queen Harrison United States 55.96
14 2 Angela Morosanu Romania 56.07
15 2 Sheena Tosta United States 56.12

text: Athletics at the 2008 Summer Olympics – Women's 400 metres hurdles
Round 1
Round 1
Rank_ Heat Name_ Nationality Result_
16 3 Aïssata Soulama Burkina Faso 56.37
17 1 Shevon Stoddart Jamaica 56.52
18 2 Nikolina Horvat Croatia 56.65
19 4 Tatyana Azarova Kazakhstan 56.88
20 4 Muna Jabir Adam Sudan 57.16
21 1 Ieva Zunda Latvia 57.43
22 1 Lucimar Teodoro Brazil 57.68
23 4 Josanne Lucas Trinidad and Tobago 57.76
24 3 Carole Kaboud Mebam Cameroon 57.81
25 2 Michelle Carey Ireland 57.99
26 4 Laia Forcadell Spain 58.64
27 3 Galina Pedan Kyrgyzstan 1:00.31

Question: What is the name of the player with a rank of 23 or less, a run of 4 and a score of 55.91 in Athletics at the 2008 Summer Olympics - Women's 400 meter hurdles, Round 1?

Question: What is the heat of the player with a rank of 18 or less and a score of 55.15 in Athletics at the 2008 Summer Olympics - Women's 400 meter hurdles Round 1?