| Examples | Sentences | Crashes | Derivations |
| 1 | Who do you expect to win? (Chomsky 2015:10) | 4 | 1 |
| 2 | What will Mary buy? (Pesetsky & Torrego 2001:369) | 3 | 2 |
| 3 | What did Mary buy?/*What Mary bought? (Pesetsky & Torrego 2001:357) | 2 | 1 |
| 4 | Who bought the book?/*Who did buy the book? (Pesetsky & Torrego 2001:357) | 2 | 1 |
| 5 | Bill asked what Mary bought./*Bill asked what did/that Mary buy. (Pesetsky & Torrego 2001:378) | 3 | 1 |
| 6 | What did John say that Mary will buy? (Pesetsky & Torrego 2001:370) | 5 | 2 |
| 7 | *Who do you think that read the book? (Chomsky 2015:10) | 3 | 1 |
| 8 | Who do you think read the book? (Example 31a, from Chomsky 2015:10) | 3 | 1 |
| 9 | What do you think that John read? | 3 | 1 |
| 10 | What do you think John read? | 3 | 1 |
| 11 | What did John say Mary will buy? (Pesetsky & Torrego 2001:370) | 5 | 2 |
| 12 | *Who did John say that will buy the book? (Pesetsky & Torrego 2001:371) | 5 | 2 |
| 13 | Who did John say will buy the book? (Pesetsky & Torrego 2001:371) | 5 | 2 |