Update seminar.md

seminar.md

@@ -50,17 +50,17 @@ and a mattermost channel for chat. To join the mattermost channel:
 
 |Date|Speaker|Title/Topic|
 |----|-------|-----------|
-|2021-07-05| ? | summer break |
-|2021-06-07| ? | summer break |
+|2021-07-05| - | *summer break* |
+|2021-06-07| - | *summer break* |
 |2021-05-10| Anton Lorenzen | A type system for natural language ([slides](https://nc.kwarc.info/s/piPmS9rzJar2bkB)) |
 |2021-04-12| Deyan Ginev | Scientific Statement Classification over arXiv.org ([slides](https://prodg.org/talks/scientific_statement_classification#1)) |
 |2021-03-29| André Greiner-Petter | Comparative Verification of Digital Mathematical Libraries and Computer Algebra Systems ([slides](https://gist.github.com/AndreG-P/4fdbd42f313d112c888c10c2136a3620)) |
 |2021-03-15| Peter Koepke | Isabelle/Naproche |
 |2021-03-01| Bernhard Schröder | Framed proofs -- Linguistic aspects of proof texts and frames |
-|2021-02-15| - | cancelled |
+|2021-02-15| - | *cancelled* |
 |2021-02-01| Takuto Asakura | Towards Grounding of Formulae ([slides](https://drive.google.com/file/d/1JxNKW5M0KKYeBeL6Umsg6ZKBNzdCV_DC/view)) |
 |2021-01-18| Jan Frederik Schaefer | A Symbolic Framework for Mathematical Language Understanding ([slides](https://github.com/jfschaefer/slides/blob/master/2021/sigmathling/slides.pdf)) |
-|2021-01-04| - | cancelled (too close to New Year) |
+|2021-01-04| - | *cancelled (too close to New Year)* |
 |2020-12-21| Deborah Mendes Ferreira | Premise Selection in Natural Language: Finding supporting facts for mathematical statements ([slides](https://docs.google.com/presentation/d/14ZVrp2kiOmthWeLBugraFdIVkd4z-PqfJMT-nlRX-e4/edit?usp=sharing)) |
 |2020-12-07|Deyan Ginev|Language and mathematics pretraining in 2021: preparing the large open datasets ([slides](https://prodg.org/talks/language_and_math_model_pretraining))|