THIS WORK WAS PARTLY PREPARED IN THE CONTEXT OF THE NEXT-LAB PROJECT, WHICH HAS RECEIVED FUNDING FROM THE EUROPEAN UNION'S HORIZON 2020 RESEARCH AND INNOVATION PROGRAMME UNDER GRANT AGREEMENT NO 731685. THIS PUBLICATION REFLECTS THE AUTHORS' VIEWS ONLY, AND THE EUROPEAN COMMISSION IS NOT RESPONSIBLE FOR ANY USE THAT MAY BE MADE OF THE INFORMATION IT CONTAINS. OUR THANKS GO TO THE LARGE GROUP OF PEOPLE WHO HAVE CONTRIBUTED TO THE DEVELOPMENT OF THE GO-LAB ECOSYSTEM IN THE GO-LAB AND NEXT-LAB PROJECTS: UNIVERSITY OF TWENTE: ANJO ANJEWIERDEN, LARS BOLLEN, NATASHA DMOSHINSKAIA, JOEP VAN DER GRAAF, HAGOP JAMKOJIAN, CASPER DE JONG, ELLEN KAMP, BAS KOLLOFFEL, KAREL KROEZE, SHARANJA LAL, HENNY LEEMKUIL, SISWA VAN RIESEN, JAKOB SIKKEN; ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE: JUAN CARLOS FARAH, STEN GOVAERTS, WISSAM HALIMI, ADRIAN HOLZER, ANDRE NOGUEIRA, YVES PIGUET, CHRISTOPHE SALZMANN, ANDRII VOZNIUK, ALEX WILD; INFORMATION MULTIMEDIA COMMUNICATION AG: YIWEI CAO, ALLA DOMKE, NILS FALTIN, SEYEDMOSTAFA HOSSEINI, HELKO LEHMANN, EVGENIJ MYASNIKOV, ROLA SAYEGH, SVEN STEUDTER; EUN PARTNERSHIP AISBL: AGUEDA GRAS-VELAZQUEZ, ENRIQUE MARTIN; ELLINOGERMANIKI AGOGI SCHOLI PANAGEA SAVVA AE: GEORGIOS MAVROMANOULAKIS, SOFOKLIS SOTIRIOU, ELEFTHERIA TSOURLIDAKI; UNIVERSITY OF CYPRUS: NIKOLETTA XENOFONTOS; UNIVERSIDAD DE LA IGLESIA DE DEUSTO: JAVIER GARCIA ZUBIA, IRATXE MENCHACA SIERRA, PABLO ORDUNA; UNIVERSITY OF TARTU:ALI LEIJEN, MARIO MAEOTS, MEELI RANNASTU, LEO SIIMAN; NUCLEO INTERACTIVO DE ASTRONOMIA: MARIA LUISA TEIXEIRA DE ALMEIDA; ECOLE NORMALE SUPERIEURE DE LYON: MYRIAM BENTOUM, CHARLES-HENRI EYRAU, CAROLE LAROSE, ERIC LEJA, VALENTIN ROUSSEL; UNIVERSITY OF TURKU:ESSI AHOKOSKI, JESPER LEMPIAINEN, MIKAEL SJOMAN, TEEMU TUONONEN, KOEN VEERMANS; UNIVERSITY OF LEICESTER: PAMELA ANDRADE, MATTHIAS HEINTZ, ROBERT EDLIN-WHITE; UNIVERSITY OF DUISBURG-ESSEN: KRISTINA ANGENENDT, ADAM GIEMZA, TOBIAS HECKING, ULRICH HOPPE, SVEN MANSKE; NATIONAL DISTANCE EDUCATION UNIVERSITY (UNED): MANUEL CASTRO, GERMAN CARRO, MIGUEL RODRIGUEZ, ELIO SAN CRISTOBAL; CERTH: DEMETRIOS SAMPSON, STYLIANOS SERGIS, ALEXANDROS TRICHOS, PANAGIOTIS ZERVAS; CUAS: MICHAEL AUER, CHRISTIAN KREITER, DANILO GARBI ZUTIN; CARDIFF UNIVERSITY: FRASER LEWIS, SARAH ROBERTS, PAUL ROCHE; IASA: KRISTINA KOURKOUMELI, STELIOS VOURAKIS. ADDITIONALLY, WE WOULD LIKE TO THANK OUR COLLEAGUES FROM GO-GA (EU H2020) AND TW1ST (NWO/NRO).