on 1907-12, what projected started?
Entity
m.0x0b3l7
Design and Construction of the Kinzie Street Railroad Bridge
class literal
projects.project 1907-12^^http://www.w3.org/2001/XMLSchema#gYearMonth
projects.project type.datetime
Project 1907-12
none none
projects.project.start_date
Start date
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :projects.project . 
VALUES ?x1 { "1907-12-08:00"^^<http://www.w3.org/2001/XMLSchema#gYearMonth> } 
?x0 :projects.project.start_date ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND projects.project (JOIN projects.project.start_date 1907-12^^http://www.w3.org/2001/XMLSchema#gYearMonth))