title: scrapy spider not returning any results
body: <p>This is my first attempt to create a spider, kindly spare me if I have not done it properly.
  Here is the link to the website I am trying to extract data from. <a href="http://www.4icu.org/in/" rel="nofollow">http://www.4icu.org/in/</a>. I want the entire list of colleges that is being displayed on the page. But when I run the following spider I am returned with an empty json file. 
  my items.py</p>
  
  <pre><code>    import scrapy
      class CollegesItem(scrapy.Item):
      # define the fields for your item here like:
          link = scrapy.Field() 
  </code></pre>
  
  <p>This is the spider
  colleges.py</p>
  
  <pre><code>    import scrapy
      from scrapy.spider import Spider
      from scrapy.http import Request
  
      class CollegesItem(scrapy.Item):
      # define the fields for your item here like:
          link = scrapy.Field()
  
      class CollegesSpider(Spider):
          name = 'colleges'
          allowed_domains = ["4icu.org"]
          start_urls = ('http://www.4icu.org/in/',)
  
          def parse(self, response):
              return Request(
                  url = "http://www.4icu.org/in/",
                  callback = self.parse_fixtures
              )
          def parse_fixtures(self,response):
              sel = response.selector
              for div in sel.css("col span_2_of_2&gt;div&gt;tbody&gt;tr"):
                  item = Fixture()
                  item['university.name'] = tr.xpath('td[@class="i"]/span  /a/text()').extract()
                  yield item
  </code></pre>