diff --git a/src/main/java/cz/cvut/kbss/analysis/dao/SystemDao.java b/src/main/java/cz/cvut/kbss/analysis/dao/SystemDao.java
index 498c66e..2733731 100755
--- a/src/main/java/cz/cvut/kbss/analysis/dao/SystemDao.java
+++ b/src/main/java/cz/cvut/kbss/analysis/dao/SystemDao.java
@@ -1,18 +1,36 @@
 package cz.cvut.kbss.analysis.dao;
 
 import cz.cvut.kbss.analysis.config.conf.PersistenceConf;
+import cz.cvut.kbss.analysis.model.Component;
 import cz.cvut.kbss.analysis.model.System;
 import cz.cvut.kbss.analysis.service.IdentifierService;
 import cz.cvut.kbss.analysis.service.security.SecurityUtils;
+import cz.cvut.kbss.analysis.util.Vocabulary;
 import cz.cvut.kbss.jopa.model.EntityManager;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Repository;
 
+import java.net.URI;
+import java.util.List;
+
 @Repository
 public class SystemDao extends ManagedEntityDao<System> {
 
+    protected static final URI HAS_COMPONENT_PART = URI.create(Vocabulary.s_p_has_part_component);
+
     @Autowired
     protected SystemDao(EntityManager em, PersistenceConf config, IdentifierService identifierService, SecurityUtils securityUtils) {
         super(System.class, em, config, identifierService, securityUtils);
     }
+
+    public List<Component> findComponents(URI systemURI){
+        return em.createNativeQuery("""
+                SELECT ?uri {
+                    ?systemURI (?hasComponentPartProp)+ ?uri.
+                }                    
+                """)
+                .setParameter("systemURI", systemURI)
+                .setParameter("hasComponentPartProp", HAS_COMPONENT_PART)
+                .getResultList();
+    }
 }
diff --git a/src/main/java/cz/cvut/kbss/analysis/model/Item.java b/src/main/java/cz/cvut/kbss/analysis/model/Item.java
index 260fa4b..e467730 100644
--- a/src/main/java/cz/cvut/kbss/analysis/model/Item.java
+++ b/src/main/java/cz/cvut/kbss/analysis/model/Item.java
@@ -19,7 +19,7 @@ public class Item extends DomainEntity<Item> {
     @OWLObjectProperty(iri = Vocabulary.s_p_is_documented_in)
     private Set<Document> documents;
 
-    @OWLObjectProperty(iri = Vocabulary.s_p_has_part_component, cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    @OWLObjectProperty(iri = Vocabulary.s_p_has_part_component, cascade = CascadeType.ALL)
     private Set<Component> components = new HashSet<>();
 
     public void addComponent(Component component) {
diff --git a/src/main/java/cz/cvut/kbss/analysis/service/SystemRepositoryService.java b/src/main/java/cz/cvut/kbss/analysis/service/SystemRepositoryService.java
index a8a4ba5..29c16b9 100755
--- a/src/main/java/cz/cvut/kbss/analysis/service/SystemRepositoryService.java
+++ b/src/main/java/cz/cvut/kbss/analysis/service/SystemRepositoryService.java
@@ -51,6 +51,17 @@ protected GenericDao<System> getPrimaryDao() {
         return systemDao;
     }
 
+    // TODO check if this works for lazy loading
+    @Transactional
+    @Override
+    public System findRequired(URI id) {
+        System system = super.findRequired(id);
+        // fetch partonomy
+        systemDao.findComponents(id);
+
+        return system;
+    }
+
     @Transactional
     public System rename(System systemRename) {
         log.info("> rename - {}", systemRename);