The dataset provides material relating to a questionnaire entitled "Semantic Web: Perspectives". This questionnaire was addressed to the W3C Semantic Web mailing list (semantic-web@w3.org) and was open to responses from May 12th to May 25th, 2019. A total of 113 responses were collected in this time. The following files are provided: public-comments.txt: provides the public comments of respondents in plain text; questionnaire-form.pdf: illustrates the design of the questionnaire, including questions, types of responses permitted, etc.; questionnaire-responses.tsv: lists the individual responses (without private comments) as a tab-separated values file; success-keywords.xlsx: provides a spreadsheet mapping success story responses to a list of keywords, further providing statistics on these keywords; wordcloud-bw.svg: provides a word-cloud of success-story keywords in black & white; wordcloud-colour.svg: provides a word-cloud of success-story keywords in colour. The word-clouds were produced using Jason Davies' online service, copying and pasting the keywords from the success-keywords.xlsx spreadsheet (e.g., Column A, Sheet Statistics) into the text field; the following settings were selected: Orientations from 0° to 0°, Spiral: Rectangular; Scale: n; Number of words: 400; One word per line: ticked; Font: Patua One (must be installed locally beforehand). The resulting SVG files were later modified in a text editor to add a link to the font used, to tighten the bounding box, and to produce a black & white version. We thank the respondents for providing their input.