Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Rena Kato
Table title:
With AKB48
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > No. </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 > "Chance no Junban" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Her very first single appearance in AKB48. Did not participate in title track. </td></tr>
<tr> <td colspan=1 rowspan=3 > 2011 </td><td colspan=1 rowspan=1 > 20 </td><td colspan=1 rowspan=1 > "Sakura no Ki ni Narō" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate in title track. Sang on the track "Ougon Center" as Team Kenkyuusei. </td></tr>
<tr> <td colspan=1 rowspan=1 > 21 </td><td colspan=1 rowspan=1 > "Everyday, Katyusha" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate in title track. Sang on the track "Anti" as Team Kenkyuusei. </td></tr>
<tr> <td colspan=1 rowspan=1 > 23 </td><td colspan=1 rowspan=1 > "Kaze wa Fuiteiru" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate in title track. Sang on the track "Kimi No Senaka" as Undergirls, and on "Tsubomitachi" as Team 4 + Kenkyuusei. </td></tr>
<tr> <td colspan=1 rowspan=5 > 2012 </td><td colspan=1 rowspan=1 > 25 </td><td colspan=1 rowspan=1 > "Give Me Five!" </td><td colspan=1 rowspan=1 > Special Girls A </td><td colspan=1 rowspan=1 > Did not participate in title track. Sang on the track "New Ship" as part of Special Girls A. </td></tr>
<tr> <td colspan=1 rowspan=1 > 26 </td><td colspan=1 rowspan=1 > "Manatsu no Sounds Good!" </td><td colspan=1 rowspan=1 > A-side, Selection 10 </td><td colspan=1 rowspan=1 > Her very first participation on an A-side. Also sang on the track "Choudai, Darling!" as part of Selection 10. </td></tr>
<tr> <td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 > "Gingham Check" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not rank on the election. Sang on the track "Ano Hi No Fuurin" as Waiting Girls. </td></tr>
<tr> <td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > "Uza" </td><td colspan=1 rowspan=1 > B-side, New Team B </td><td colspan=1 rowspan=1 > Did not participate on title track. Sang on the track "Tsugi No Season" as Undergirls, and on "Seigi No Mikata Janai Hero" as New Team B. </td></tr>
<tr> <td colspan=1 rowspan=1 > 29 </td><td colspan=1 rowspan=1 > "Eien Pressure" </td><td colspan=1 rowspan=1 > B-side, OKL48 </td><td colspan=1 rowspan=1 > Did not participate on title track; lineup was determined by rock-paper-scissors tournament. Sang on "Watashitachi No Reason"; and on "Eien Yori Tsuzuku Yōu Ni" as part of OKL48. </td></tr>
<tr> <td colspan=1 rowspan=4 > 2013 </td><td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > "So Long!" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate on title track. Sang on the track "Waiting Room" as Undergirls, and on "Sokode Inu no Unchi Funjau Kane?" as Team B. </td></tr>
<tr> <td colspan=1 rowspan=1 > 31 </td><td colspan=1 rowspan=1 > "Sayonara Crawl" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Also sang on "Romance Kenjuu" as Team B. </td></tr>
<tr> <td colspan=1 rowspan=1 > 33 </td><td colspan=1 rowspan=1 > "Heart Electric" </td><td colspan=1 rowspan=1 > B-side, Center </td><td colspan=1 rowspan=1 > Did not participate on title track. Sang on the track "Kaisoku To Doutai Shiryoku" as the center of Undergirls, a duo center with Suda Akari. </td></tr>
<tr> <td colspan=1 rowspan=1 > 34 </td><td colspan=1 rowspan=1 > "Suzukake no Ki no Michi de "Kimi no Hohoemi o Yume ni Miru" to Itte Shimattara Bokutachi no Kankei wa Dō Kawatte Shimau no ka, Bokunari ni Nan-nichi ka Kangaeta Ue de no Yaya Kihazukashii Ketsuron no Yō na Mono" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate on title track; lineup was determined by rock-paper-scissors tournament. Sang on the track "Mosh & Dive" as Undergirls, and "Party Is Over" as AKB48 Senbatsu. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > 2014 </td><td colspan=1 rowspan=1 > 35 </td><td colspan=1 rowspan=1 > "Mae Shika Mukanee" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate on title track. Sang on the track "Kino Yori Motto Suki" as Undergirls. </td></tr>
<tr> <td colspan=1 rowspan=1 > 36 </td><td class="highlighted"  colspan=1 rowspan=1 > "Labrador Retriever" </td><td class="highlighted"  colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Also sang on "Heart no Dasshutsu Game" as New Team 4. She is now part of Team 4. </td></tr>
<tr> <td colspan=1 rowspan=1 > 37 </td><td colspan=1 rowspan=1 > "Kokoro no Placard" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Ranked 32nd in 2014 General Election. Sang on "Dareka ga Nageta Ball" as Undergirls. </td></tr>
<tr> <td colspan=1 rowspan=1 > 38 </td><td colspan=1 rowspan=1 > "Kiboteki Refrain" </td><td colspan=1 rowspan=1 > A-Side </td><td colspan=1 rowspan=1 > Also sang on "Me o Akete Mama no First Kiss" as part of Team 4. </td></tr>
<tr> <td colspan=1 rowspan=4 > 2015 </td><td colspan=1 rowspan=1 > 39 </td><td colspan=1 rowspan=1 > "Green Flash" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Sang "Haru no Hikari Chikadzuita Natsu" </td></tr>
<tr> <td colspan=1 rowspan=1 > 40 </td><td colspan=1 rowspan=1 > "Bokutachi wa Tatakawanai" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 41 </td><td colspan=1 rowspan=1 > "Halloween Night" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Did not participate on title track. Ranked 28th in 2015 General Election. </td></tr>
<tr> <td colspan=1 rowspan=1 > 42 </td><td colspan=1 rowspan=1 > "Kuchibiru ni Be My Baby" </td><td colspan=1 rowspan=1 > A-Side </td><td colspan=1 rowspan=1 > Also sang on "Madona's Choice" as a part of Renacchi's Senbatsu Sousenkyo and "Kin no Hane wo Motsu Hito yo" as part of Team B. </td></tr>
<tr> <td colspan=1 rowspan=4 > 2016 </td><td colspan=1 rowspan=1 > 43 </td><td colspan=1 rowspan=1 > "Kimi wa Melody" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Marked as the 10th Anniversary Single. Also sang on "LALALA Message" as Next Generation Senbatsu and "Mazariau Mono" as NogizakaAKB. </td></tr>
<tr> <td colspan=1 rowspan=1 > 44 </td><td colspan=1 rowspan=1 > "Tsubasa wa Iranai" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Sang on "Koi o Suru to Baka o Miru" as Team B. </td></tr>
<tr> <td colspan=1 rowspan=1 > 45 </td><td colspan=1 rowspan=1 > "Love Trip / Shiawase wo Wakenasai" </td><td colspan=1 rowspan=1 > B-side </td><td colspan=1 rowspan=1 > Also sang "Densetsu no Sakana" as Under Girls and "Black Flower". </td></tr>
<tr> <td colspan=1 rowspan=1 > 46 </td><td colspan=1 rowspan=1 > "High Tension" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Sang on "Happy End" as Team B. </td></tr>
<tr> <td colspan=1 rowspan=4 > 2017 </td><td colspan=1 rowspan=1 > 47 </td><td colspan=1 rowspan=1 > "Shoot Sign" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 > Sang on "Acccident Chū </td></tr>
<tr> <td colspan=1 rowspan=1 > 48 </td><td colspan=1 rowspan=1 > "Negaigoto no Mochigusare" </td><td colspan=1 rowspan=1 > A-side </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What year did Rena Kato release "Labrador Retriever," and what role did it have?
Answer:
In 2014, Rena Kato's A-side titled "Labrador Retriever" was released.