This is the full 220 item dataset from exported from Altmetric Explorer on October 18, 2017. It includes items where "altmetrics" appears in journal articles' titles or abstracts. Of the 220 items in this dataset, only 215 have online attention in the sources tracked by Altmetric.
The top 50 articles in this dataset (by Altmetric Attention Score) will profiled in the Open Access Week 2017 blogpost, "The top altmetrics research is impressively Open Access!" on the Altmetric blog.