Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What kind of Entrant has a Maserati Straight-6 Engine, built in the year 1958 or early, and has a Maserati 250f Chassis with points less than 4?

### Inputs:
table_name: table, columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']

### Response:
SELECT Entrant FROM table WHERE Engine = maserati straight-6 AND Year < 1958 AND Chassis = maserati 250f AND Points < 4