Teacher:Given the following Catalan sentence, indicate the name entities (i.e., the real-world objects such as a person, location, organization, etc. that can be denoted with a proper name) such as 'New York Times'.  For each words of a named-entity, indicate their type 'LOC' or 'ORG' or 'PER', where 'LOC' indicates a location entity (such as 'New York City', 'ORG' indicates the token of an organization (such as 'Amazon'), 'PER' indicates the tokens of a person entity (such as 'Jeff Bezos'). Named entities with other types should be indicated with 'MISC'. To indicate boundaries of an entity, use IOB (Inside-Output-Begin) prefixes. The B- prefix before a tag indicates that the word is the beginning of a named entity. The I- prefix indicates that the word is inside a bigger chunk. For example, you can break 'New York' to 'New' and 'York.' and tag them as 'B-LOC' and 'I-LOC'. Any token that doesn't belong to a named entity must be tagged with 'O'. 
Teacher: Now, understand the problem? Solve this instance: El 25 % dels futurs usuaris del Tren d' Alta Velocitat ( TAV ) de la regió metropolitana de Barcelona utilitzarà l' estació del Vallès per agafar el tren , segons un estudi que ha fet l' Ajuntament de Terrassa .
Student:
El (O) 25 (O) % (O) dels (O) futurs (O) usuaris (O) del (O) Tren (B-MISC) d' (I-MISC) Alta (I-MISC) Velocitat (I-MISC) ( (O) TAV (B-MISC) ) (O) de (O) la (O) regió (O) metropolitana (O) de (O) Barcelona (B-LOC) utilitzarà (O) l' (O) estació (O) del (O) Vallès (B-LOC) per (O) agafar (O) el (O) tren (O) , (O) segons (O) un (O) estudi (O) que (O) ha (O) fet (O) l' (O) Ajuntament (B-ORG) de (I-ORG) Terrassa (I-ORG) . (O)