|Rank|Lane|Name|Nationality|React|Time|Notes|
|---|---|---|---|---|---|---|
|1|4|Yelizaveta Bryzhina|Ukraine|0.245|23.10|Q|
|2|6|Myriam Soumaré|France|0.179|23.22|Q|
|3|3|Ksenija Balta|Estonia|0.205|23.75|Q|
|4|5|Niamh Whelan|Ireland|0.253|23.78|q|
|5|7|Sabina Veit|Slovenia|0.205|23.78||
|6|2|Elin Backman|Sweden|0.217|24.13||
|||||Wind: -2.6 m/s|Wind: -2.6 m/s|Wind: -2.6 m/s|

Question: what number of last names start with "b"?
Answer: 3