SELECT School_id FROM School WHERE County = "50 Marshall" AND Location != "Knox" AND "Enrollment" != 620 OR Mascot != "Cavaliers" OR School_id = "7" EXCEPT SELECT School_id FROM endowment WHERE "endowment_id" > 3 OR "School_id" <= 3 AND "amount" <= 8.33 <table_name> : School col : School_id | School_name | Location | Mascot | Enrollment | IHSAA_Class | IHSAA_Football_Class | County row 1 : 1 | Bremen | Bremen | Lions | 495 | AA | AA | 50 Marshall row 2 : 2 | Culver Community | Culver | Cavaliers | 287 | A | A | 50 Marshall row 3 : 3 | Glenn | Walkerton | Falcons | 605 | AAA | AAA | 71 St. Joseph row 4 : 4 | Jimtown | Elkhart | Jimmies | 601 | AAA | AAA | 20 Elkhart row 5 : 5 | Knox Community | Knox | Redskins | 620 | AAA | AAA | 75 Starke row 6 : 6 | LaVille | Lakeville | Lancers | 379 | AA | A | 71 St. Joseph row 7 : 7 | New Prairie 1 | New Carlisle | Cougars | 852 | AAA | AAAA | 46 LaPorte 71 St. Joseph row 8 : 8 | Triton | Bourbon | Trojans | 316 | A | A | 50 Marshall <table_name> : endowment col : endowment_id | School_id | donator_name | amount row 1 : 1 | 1 | Monte Plata | 9.51 row 2 : 2 | 2 | San JosÃ© de Ocoa | 9.83 row 3 : 3 | 3 | Distrito Nacional | 9.55 row 4 : 4 | 3 | Valverde | 9.73 row 5 : 5 | 3 | San CristÃ³bal | 9.05 row 6 : 6 | 4 | Santo Domingo Este | 8.99 row 7 : 7 | 4 | Santiago | 8.85 row 8 : 8 | 5 | Duarte | 8.53 row 9 : 9 | 6 | Com. Dom. En Estados Unidos | 8.43 row 10 : 10 | 7 | La Vega | 8.82 row 11 : 11 | 8 | Peravia | 8.33
col : School_id row 1 : 1 row 2 : 2 row 3 : 3 row 4 : 4 row 5 : 5 row 6 : 6 row 7 : 7 row 8 : 8