how many units of length are there in the finnish obsolete units of measurement?
Value
4
class entity
measurement_unit.distance_unit m.07s8j1
measurement_unit.distance_unit measurement_unit.measurement_system
Unit of Length Finnish obsolete units of measurement
count none
measurement_unit.measurement_system.length_units
Length Units
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 (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :measurement_unit.distance_unit . 
VALUES ?x1 { :m.07s8j1 } 
?x1 :measurement_unit.measurement_system.length_units ?x0 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND measurement_unit.distance_unit (JOIN (R measurement_unit.measurement_system.length_units) m.07s8j1)))