Released on 27/02/2021 New datasets (questionnaires and their alignments): EVS wave 5: Available in the following languages: Czech, English (Great Britain, Ireland and Malta), French (Belgium, France, Switzerland and Luxembourg), German (Austria, Germany, Switzerland and Luxembourg), Norwegian, Portuguese (Portugal and Luxembourg), Spanish (Spain) and Russian (Azerbaijan, Belarus, Estonia, Georgia, Lithuania, Latvia, Moldavia, Russian Federation and Ukraine). ESS round 7: available in the following languages: English (source, Great Britain and Ireland), French (Belgium, France and Switzerland), German (Austria, Germany and Switzerland), Norwegian and Portuguese (Portugal) ESS round 8: available in the following languages: English (source), French (Belgium, France and Switzerland), German (Austria, Germany and Switzerland), Norwegian and Russian (Lithuania and Russian Federation). ESS round 9: available in the following languages: English (source), French (Belgium, France and Switzerland), German (Austria, Germany, Switzerland), Norwegian and Russian (Latvia and Russian Federation). SHARE waves 7 and 8: available in the following languages: Catalan, Czech, English (source and Malta), French (Belgium, France, Switzerland and Luxembourg), German (Austria, Germany, Switzerland and Luxembourg), Portuguese (Portugal and Luxembourg), Russian (Estonia, Israel and Latvia) and Spanish (Spain) Added ESS supplementary modules: ESS round 1: Module G in NOR_NO, CAT_ES, and SPA_ES questionnaires. ESS round 2: CAT_ES (G, National Module), ENG_GB (J), ENG_IE (H), ENG_LU (H, I), ENG_SOURCE (H), FRE_BE (H), FRE_CH (G, J), FRE_FR (J, G), FRE_LU (G, H, I), GER_AT (J, H, G), GER_CH (J, H, G), GER_DE (J, H, G, N), GER_LU (G, H, I), NOR_NO (G, H), POR_PT (G, H, J), RUS_EE (H, J), RUS_UA (National modules T and R, H, J). ESS round 3: CAT_ES (G, I), ENG_GB (G, I), ENG_IE (G, I), ENG_SOURCE (G, I),FRE_BE (G, I), FRE_CH (G, I), FRE_FR (G, I), GER_AT (G, I), GER_CH (G, I), GER_DE (G, I), NOR_NO (G, I), POR_PT (G, I), RUS_EE (G, I), RUS_LV (G, I), RUS_RU (G, I), RUS_UA (G, I, National module R), SPA_ES (G, I, national module K). ESS round 4: CAT_ES (G, I), CZE_CZ (G, I), ENG_GB (G, I), ENG_IE (G, H, I), ENG_SOURCE (G, I), FRE_BE (G), FRE_CH (G), FRE_FR (G), GER_AT (G, I), GER_CH (G), GER_DE (G, I, N), NOR_NO (G, I), POR_PT (G, I), RUS_EE (G, I), RUS_IL (G, I), RUS_LT (G, I), RUS_LV (G, I), RUS_RU (G, I), RUS_UA (G, I), SPA_ES (G, I). ESS round 5: CAT_ES (G, H, J), CZE_CZ (G, H, J), ENG_GB (G, H, J), ENG_IE (G, H, J), ENG_SOURCE (G, H, J), FRE_BE (G, H), FRE_CH (G, H), FRE_FR (G, H), GER_AT (G, H, J), GER_CH (G, H, J, I), GER_DE (G, H, J, N), NOR_NO (G, H, J), POR_PT (G, H, J), RUS_IL (H), RUS_LT (G, H, J), RUS_RU (G, H, J), RUS_UA (G, H, J), RUS_RU (G, H, J), RUS_UA (G, H, J), SPA_ES (G, H, J). ESS round 6: CAT_ES (H, J), CZE_CZ (H, J), ENG_GB (H, J), ENG_IE (H, J), ENG_SOURCE (H, J), FRE_BE (H, J), FRE_CH (H, J), FRE_FR (H, J), GER_CH (H, J), GER_DE (H, J, N), NOR_NO (H, J), POR_PT (H, J), RUS_EE (H, J, I), RUS_IL (I), RUS_RU (H, J), RUS_UA (H, J, I), SPA_ES (H, J). Question introduction annotation: coverage of introduction text segment identification increased in ESS rounds 4, 5, 6 and 7.