what is limited by the maximum age for eligibility of observational?
Entity Entity Entity
m.03zbbxm m.03zbbvl m.04dhj52
The Effects of Illnesses on HIV Levels in the Body Evaluation of Neuromuscular Disease Role of Antibodies in Cognitive Dysfunction in Patients With Systemic Lupus Erythematosus
class entity
medicine.medical_trial m.03zbcmd
medicine.medical_trial medicine.medical_trial_type
Medical trial Observational
none none
medicine.medical_trial.type_of_trial
Type of trial
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 :medicine.medical_trial . 
VALUES ?x1 { :m.03zbcmd } 
?x0 :medicine.medical_trial.type_of_trial ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND medicine.medical_trial (JOIN medicine.medical_trial.type_of_trial m.03zbcmd))