Labor (2) Nature (2) Id (Psychology) (2) Naturaleza (2) Trabajo (2) Ello (2) Programs (1) Grammar, Comparative and general--Ellipsis (1) Weights and measures (1) Taxation (1) Senses and sensation (1) Quality of products (1) Punctuation (1) Production (Economic theory) (1) Perspective (1) Newspapers--Sections, columns, etc (1) Methodology (1) Medicine (1) Computational linguistics (1) Linguistics (1) Language and languages (1) Interest (1) Initials (1) Happiness (1) Good and evil (1) Generative grammar (1) Children (1) Programas (1) Elipsis (1) Puntuación (1)