| human | Q5 |
| P184 | doctoral advisor | Ralf Lämmel | Q28009024 |
| Paul Klint | Q102110588 | ||
| P69 | educated at | University of Amsterdam | Q214341 |
| P734 | family name | Visser | Q18340752 |
| Visser | Q18340752 | ||
| Visser | Q18340752 | ||
| P735 | given name | Johannes | Q2117521 |
| Johannes | Q2117521 | ||
| Willem | Q15282375 | ||
| Willem | Q15282375 | ||
| Michiel | Q15621024 | ||
| Michiel | Q15621024 | ||
| P21 | sex or gender | male | Q6581097 |
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