 <translate> Passage: Elections to the United States Senate will be held November 6, 2018, with 33 of the 100 seats in the Senate being contested in regular elections. The winners will serve six-year terms from January 3, 2019, to January 3, 2025. Currently, Democrats have 23 seats up for election along with 2 independents who caucus with them. Republicans have 8 seats up for election. Two of the Republican seats are open as a result of Tennessee Senator Bob Corker's and Arizona Senator Jeff Flake's pending retirements. The seats up for election in 2018 were last up for election in 2012, although some seats may have special elections if incumbents die or resign, as has already happened in Alabama and Minnesota. After the 2016 elections, some state election officials are trying to upgrade voting systems in time for this election.

Question: Based on this passage, how many senate seats are up for election in 2018?
33 <yor> Ìyípadà: Ìdìbò fún Sẹ́nétì Orílẹ̀-èdè Amẹ́ríkà yóò wáyé ní November 6, 2018, pẹ̀lú 33 nínú àwọn ìjókòó 100 ní Sẹ́nétì tí wọ́n ń díje nínú ìdìbò déédéé. Àwọn tí wọ́n bá gba àmì ẹ̀yẹ yìí yóò sìn fún ọdún mẹ́fà láti 3 January 2019 sí 3 January 2025. Lọwọlọwọ, awọn Democrat ni awọn ijoko 23 fun idibo pẹlu awọn ominira 2 ti o ni idajọ pẹlu wọn. Àwọn ará Republican ní ìjókòó mẹ́jọ fún ìdìbò. Meji ninu awọn ijoko ti Republican wa ni ṣi nitori abajade ti Tennessee Senator Bob Corker's ati Arizona Senator Jeff Flake's ti n duro de ifẹhinti. Àwọn ìjókòó tí ó wà fún ìdìbò ní ọdún 2018 ni a dìbò fún ní ọdún 2012, bí ó tilẹ̀ jẹ́ pé àwọn ìjókòó kan lè ní ìdìbò àkànṣe bí àwọn tí ó wà nípò bá kú tàbí fi ipò sílẹ̀, gẹ́gẹ́ bí ó ti ṣẹlẹ̀ ní Alabama àti Minnesota. Lẹ́yìn ìdìbò ọdún 2016, àwọn òṣìṣẹ́ ìdìbò ìpínlẹ̀ kan ń gbìyànjú láti ṣe àtúnṣe sí àwọn ètò ìdìbò wọn kí wọ́n tó dìbò yìí.  Ìbéèrè: Ní ìbámu pẹ̀lú àyọkà yìí, àwọn ìjókòó mélòó ni yóò wà fún ìdìbò nínú ilé ìgbìmọ̀ aṣòfin àgbà ní ọdún 2018? 33 ì ì 