def extract_test_data(capabilities):
    """
    Extracts test data from a list of capabilities.

    Args:
        capabilities (list): List of tuples containing capability information.

    Returns:
        tuple: Test data extracted from the first valid capability.
    """
    for cap in capabilities:
        if len(cap) >= 4 and cap[0].startswith('evolved_verified'):
            return cap
    return None

# Example usage:
capabilities = [('evolved_verified_generate_test_1768680667', 4235.89001196408, 51, 8305.7),
                ('verified_default', 4235.0, 51, 8303.9),
                ('evolved_verified_create_memory_1768424362', 4235.89001196408, 52, 8145.9)]

test_data = extract_test_data(capabilities)
print(test_data)