Extract the link of a web page with regex

Question

I want to extract the link from bullet train but I always get the link from bullet train down I changed the regex a hundred times but its suck what i want is the link /subtitle/sd1638012/bullet-train

def get_subtitles_link():
    title = "Bullet Train"
    subtitles = re.compile('(href="/subtitle/.+?<span)').findall(content)
    print(subtitles)
    #['href="/subtitle/sd1636595/bullet-train-down"><img src="https://cdn.subdl.com/poster/zqAd0zsic4XIkWFRV7mn09dK1jP.jpg" /></a></div><div class="sc-jFJHMl gPmNjm"><h2 class="sc-bOSxlg jLfqTt"><a class="sc-dXoxLi faLBj" href="/subtitle/sd1636595/bullet-train-down">Bullet Train Down<span', 'href="/subtitle/sd1636595/bullet-train-down"><span', 'href="/subtitle/sd1638012/bullet-train"><img src="https://cdn.subdl.com/poster/tVxDe01Zy3kZqaZRNiXFGDICdZk.jpg" /></a></div><div class="sc-jFJHMl gPmNjm"><h2 class="sc-bOSxlg jLfqTt"><a class="sc-dXoxLi faLBj" href="/subtitle/sd1638012/bullet-train">Bullet Train<span', 'href="/subtitle/sd1638012/bullet-train"><span', 'href="/subtitle/sd221144/the-bullet-train-shinkansen-daibakuha"><img src="https://cdn.subdl.com/poster/pbsBUvNJJcHRzsv6sVrY1emDDFW.jpg" /></a></div><div class="sc-jFJHMl gPmNjm"><h2 class="sc-bOSxlg jLfqTt"><a class="sc-dXoxLi faLBj" href="/subtitle/sd221144/the-bullet-train-shinkansen-daibakuha">The Bullet Train (Shinkansen daibakuha)<span', 'href="/subtitle/sd221144/the-bullet-train-shinkansen-daibakuha"><span']

    regx = 'class="sc-jFJHMl gPmNjm"><h2 class=.+?<a.+?href="(.+?)">'+title+'\s+'        
    downloadlink=re.findall(regx,subtitles[0], re.M|re.I)[0]
    print(downloadlink)
    #/subtitle/sd1636595/bullet-train-down