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:
First Aid Kit (band)
Table title:
Guest appearances
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Song </th><th colspan=1 rowspan=1 > Artist </th><th colspan=1 rowspan=1 > Album </th></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > "Ten Seconds", "Armour", "Song No. 6" (as choir members) </td><td colspan=1 rowspan=1 > Ane Brun </td><td colspan=1 rowspan=1 > Live At Stockholm Concert Hall, CD+DVD </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > "Summer Rain" (Acoustic DVD version) </td><td colspan=1 rowspan=1 > Anna Ternheim </td><td colspan=1 rowspan=1 > Leaving on a Mayday, 2CD+DVD box set </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > "We're Going to Be Friends" </td><td colspan=1 rowspan=1 > Bright Eyes </td><td colspan=1 rowspan=1 > Cool for School: A Benefit for the Lunchbox Fund </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > "Do You Remember" </td><td colspan=1 rowspan=1 > Ane Brun </td><td colspan=1 rowspan=1 > It All Starts with One </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > "Godnatt" </td><td colspan=1 rowspan=1 > Bröderna Lindgren </td><td colspan=1 rowspan=1 > I Tiden </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > "Glad That You Called", "Elbow In Your Face", "The Horoscope Song", "Numbers", "The Swimming", "When Will You Notice Me In The Crowd" </td><td colspan=1 rowspan=1 > Blood Music </td><td colspan=1 rowspan=1 > The Fire And The Flame </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > "Time Forgot", "Hundreds of Ways", "Double Life", "Kick", "Night at Lake Unknown", "Governor's Ball" </td><td colspan=1 rowspan=1 > Conor Oberst </td><td colspan=1 rowspan=1 > Upside Down Mountain </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > "The Voyager" </td><td colspan=1 rowspan=1 > Jenny Lewis </td><td colspan=1 rowspan=1 > The Voyager </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > "Moving Slow", "Golden", "Little Less Blue" </td><td colspan=1 rowspan=1 > Jesper Lindell </td><td colspan=1 rowspan=1 > Little Less Blue (EP) </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > "Du Fria" </td><td colspan=1 rowspan=1 > Håkan Hellström </td><td colspan=1 rowspan=1 > Du Fria (Rullande Åska Live) single </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > "Revolution" (Released as single already in 2016) </td><td colspan=1 rowspan=1 > Van William </td><td colspan=1 rowspan=1 > Countries </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2018 </td><td class="highlighted"  colspan=1 rowspan=1 > "Ether & Wood" </td><td class="highlighted"  colspan=1 rowspan=1 > Alela Diane </td><td class="highlighted"  colspan=1 rowspan=1 > Cusp </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2018 </td><td class="highlighted"  colspan=1 rowspan=1 > "Savior" </td><td class="highlighted"  colspan=1 rowspan=1 > George Ezra </td><td class="highlighted"  colspan=1 rowspan=1 > Staying at Tamara's </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2018 </td><td class="highlighted"  colspan=1 rowspan=1 > "Goldwing" </td><td class="highlighted"  colspan=1 rowspan=1 > Little Jinder </td><td class="highlighted"  colspan=1 rowspan=1 > Hejdå </td></tr>
</table>
Question:
Which guest appearances did First Aid Kit make in 2018?
Answer:
First Aid Kit appeared in 2018's Van William's song "Revolution" on the Countries Album, Alela Diane's song Ether & Wood, off her album Cusp, in George Ezra's song Saviour, on his album Staying at Tamara's and in Little Jinder's song Goldwing, on her album Hejdå.