About: http://webisa.webdatacommons.org/250429620

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	At least four adjacent rows that are filled with blocks except for a single hole in the same column.[5]
http://www.w3.org/ns/prov#wasQuotedFrom	tetrisconcept.net